How to Sew on a Patch by Hand: 7 Steps From Pin to Press

What Is in This Guide

What You Need Before You Start

• Needle: a sharps in size 7 to 9 for woven cotton and most badge cloth, a denim needle for jeans, and a curved needle with a 2 inch radius if you are working inside a bag or a lined jacket.
• Thread: polyester, 40 weight, cut to 18 inches and doubled through the eye. Cotton thread is weaker at the same thickness and fades faster on a washable garment.
• Thimble: not optional on denim, canvas or leather. It is what lets you push the needle through instead of bending it.
• Pins or binder clips: pins for woven cotton, clips for anything that marks, and a binder clip to hold a rolled jeans leg out of the way.
• Fusible tricot interfacing: for thin or stretchy knits, cut a half inch smaller than the patch so the patch has something to hold on to.
• Small scissors, a pressing cloth and an iron: for trimming the thread and pressing the finished repair through cloth rather than directly on the patch.

Most patch guides hand you a needle and a stitch and skip the part that decides whether the repair lasts, which is the geometry: how deep each stitch bites into the garment, how far apart the stitches sit and where the two ends are buried. A repair that peels after ten washes almost never failed because the stitch was the wrong one. It failed because the thread skimmed the patch border and never crossed into the cloth underneath.

This guide works through seven steps in the order that prevents rework, then the numbers for denim, backpacks, hats, leather and thin knit, including the awkward cases: a patch behind a hole, a patch inside a bag you cannot turn out, and whether a sewn patch is worth it over an iron-on.

What Decides Whether a Patch Holds

A hand sewn repair fails in one of four places. The thread frays where it rubs a raw patch edge. The stitches tear out of the garment because each one only caught patch and thread. The corners lift because they carry the whole load on two or three stitches. Or the whole repair puckers because the patch was stitched flat and then shrank differently from the cloth under it. Each of those has a number attached, and the numbers are what the rest of this guide works from.

Spacing decides how the load spreads. At 1/8 inch apart you get eight stitches to the inch of edge, which puts eight contact points on every inch of the join. Widen that to 1/4 inch and you halve the contact points and double the distance each stitch has to travel when the garment pulls, which is why wide, fast stitching reads as neat on day one and starts lifting at the corners three washes later. Spacing is also the cheapest thing to fix, because it costs nothing but time.

Thread matters in a narrower way than most guides suggest. Polyester all purpose thread resists abrasion and holds its colour, and it does not rot in a damp backpack the way cotton can. The one place cotton wins is a repair on an heirloom quilt you intend to wash by hand, where a soft cotton thread ages with the cloth instead of outliving it.

Step 1: Match the Thread, Needle and Stitch to the Patch

Thread diameter and needle eye has to agree, and if you are unsure which needle is which in a mixed packet the guide to sewing machine needle types explains the sizing, which is the same numbering used on hand needles. A heavy 30 weight thread in a size 10 sharps will not pass the eye cleanly, and forcing it frays the length you just cut. The table below is the combination that works for the fabrics people actually patch.

Cut 18 inches of thread for a small patch and double it through the eye so both tails pass through the needle, which gives you nine inches of working length and twice the strength at the wear point. An 18 inch single length stops being enough at about a three inch square patch, and this is where the common advice falls apart. Each whip stitch uses roughly two inches of thread: one inch across the edge, one inch of slack to pull through. A three inch square badge has 12 inches of edge, so 96 stitches take about 192 inches, which is more than 5 yards. Cut 30 to 36 inches for a badge, or plan one join on the inside where the thread runs out.

The stitch itself is a choice between speed and grip. Whip stitch is the default and covers most patches. Backstitch is for corners and anything that pulls. Blanket stitch decorates an edge while it secures it, and catch stitch is what you use where the repair has to give. The next section covers all four on their own.

Step 2: Prepare the Patch Edge and the Fabric

Wash and press both pieces before you start. A cotton patch and a cotton garment can both shrink 3 to 5 per cent on the first hot wash, and if one has been washed and the other has not, that difference shows up as a rippled patch edge that no amount of stitching can pull flat. Press the garment from the inside, and press the patch flat with the right side facing down on a cloth.

Turn the raw edge under by 1/4 inch if the piece is woven and unbacked, and press that fold hard. The fold does three jobs. It hides the cut edge that would otherwise fray into the stitching, it gives the needle a doubled band of cloth to bite, and it stops the border curling up when the thread tension pulls. Pieces with a sealed or embroidered border, which is most commercial ones, are already finished and need nothing more than a press.

Thin and stretchy fabric needs a backing or the patch will pull a hole around itself. Cut a piece of fusible tricot interfacing a half inch smaller than the piece on every side, fuse it to the inside of the garment under the repair, and stitch through all three layers. On a knit tee the same job is done by fusing a knit interfacing behind the patch area and using a ballpoint needle so the stitch slides between the loops instead of cutting them. If the fabric is so thin that it holds a pin but not a stitch, back the whole repair with a cotton patch on the inside before you start the visible one.

Step 3: Place the Patch and Pin It From the Inside

Set it where it needs to be and mark nothing on the outside. Chalk lines and marker show through on dark denim and lift the pile on velvet. If you need a reference, mark on the inside of the garment where the pin points land. For a chest patch, the top edge sits 2 to 3 inches below the collar point. For a knee patch, centre it over the knee bone and let it run 1 inch past the worn area in every direction so the stitching lands on sound cloth rather than on thinning fabric.

Use four pins on anything under three inches and six to eight on anything larger, with one pin at each corner and the rest spaced along the long edges. Angle each pin so it crosses the edge at about 45 degrees and the point comes out clear of the border. On curved surfaces, which is most of a hat and all of a backpack, pin the centre first, then work outward, easing the patch round the curve rather than forcing it.

Basting is the alternative when pins fight you, and it is worth the extra two minutes on fleece, leather and anything lined. Run long running stitches 3/8 inch inside the patch edge with a contrast thread, tie off loosely, then take the pins out. The patch cannot shift while you work, and one tug removes the basting at the end.

Applying a Patch Behind a Hole

A hole in a knee or an elbow is not repaired by sewing a square over it. If the tear is a simple split with no cloth missing, the guide to sewing a hole covers closing it without a patch at all. The cloth around the tear is already thin, so a patch on the outside becomes a new edge for the thin cloth to fail against, and it lifts within a season. The repair that lasts puts the patch behind the tear and turns the torn edges down onto it.

Cut a patch of similar weight an inch larger than the hole in every direction, in a matching colour if the frayed edges will show through, and pin it behind the hole from the inside. Trim away the loose frayed threads to a firm edge, then turn each torn edge under by 1/8 inch and stitch it down onto the patch with small stab stitches, working from the right side and keeping the stitches perpendicular to the tear. Keep the stitches inside the hole, not around it.

Do the same on a bruised area that has not torn yet, with a light darning stitch across the thin patch instead of turned-under edges. The result reads as a mend rather than a patch, which is the honest finish on workwear and on the knee of anything you actually wear outdoors.

Step 4: Start the First Stitch From Inside the Garment

Begin with the needle between the patch and the garment, at a corner and about 1/4 inch in from the edge. Pull the thread through until only a 2 inch tail is left, then take a small backstitch through the patch only, catching two or three threads of the patch backing. Pass the needle between the layers again and pull the tail snug, which locks the thread under the patch without a knot on the visible face. This is the start that survives washing, because there is no knot sitting proud of the cloth to abrade.

If a knot is easier, tie a small one and bury it. Push the needle down through the patch top at the point where you intend to begin, come up 1/2 inch away between the layers, and pull until the knot pops through the patch surface and disappears into the padding. Trim the tail to 1/8 inch and trap it under the first two stitches you make. Do not use a large tailor’s knot, which leaves a lump that shows through on light fabric.

At this stage check the placement one more time before any edge stitch goes in. Lay the garment flat, run a finger round the border and feel for a fold or a lifted corner. Every mistake at this point costs two stitches to fix. After the first full side is stitched, the same mistake costs a seam ripper and 20 minutes.

Step 5: Whip Stitch the Edge at Even Spacing

Work from right to left along the edge if you are right handed, keeping the thread on the far side of the needle. Bring the needle up through the patch border 1/8 inch from the cut edge, cross over the edge, and take the next stitch down through the garment and the patch together, 1/8 inch further along. Each stitch should sit at roughly the same angle as the last, about 90 degrees to the edge. Keep the thread tension light, just enough to close the loop, because a tight whip stitch gathers the garment and the pucker stays after the thread relaxes.

When the thread runs out, finish with two half hitches on the inside, start a new length with the buried loop described in step 4, and overlap the join by two stitches so the seam has no single thin point. Two joins on a large patch is normal and no sign of a bad job.

Which Stitch for Which Patch

Four hand stitches cover every patch most people will ever sew, and the choice is about what the edge has to do rather than about skill.

Blanket stitch works over a folded edge with a vertical loop between each stitch, so it binds the raw edge instead of crossing it. It is slower than a whip stitch and it looks deliberate, which makes it the right finish on a patch where the stitching is part of the design and on a thick edge that would otherwise fray past the thread.

Catch stitch, also called herringbone, crosses from side to side rather than over the edge, and it leaves the thread slightly loose between passes. That slack is the point: it lets the repair extend when the fabric beneath it stretches, so it is the stitch for a knit, a cuff and anywhere a rigid line of stitching would tear the cloth.

Running stitch is the fifth option and the one to be careful with: it never crosses the edge, so it only suits a patch that is also fused down, and on its own it will lift at the corners within a few washes.

Step 6: Backstitch the Corners and the Load Bearing Points

Corners lift first because a corner is where two edges meet and where a repair catches on pockets, chair arms and bag straps. Stop the whip stitch 1/4 inch short of each corner, then work three or four backstitches in a fan across the corner itself: one along each edge and one straight across the diagonal. Each backstitch goes back into the previous stitch rather than alongside it, which gives a short doubled run of thread that cannot unravel from either end.

Use the backstitch along any edge that takes pull. On a knee patch that is the two side edges. On a backpack patch it is the top edge, because the patch hangs from it. On a badge on a sleeve it is the edge nearest the cuff. A backstitched run at 3/32 inch spacing is roughly 40 per cent stronger than whip stitching at the same spacing, and it costs about twice the thread, so use it where the load is and whip the rest.

The one place to avoid backstitch is a knit that has to stretch with the garment. A dense row of backstitches on a tee will not give, and the first time the shirt goes over a head the fabric tears along the stitch line. Use a whip stitch there, or a herringbone catch stitch worked side to side so the thread has room to extend.

Step 7: Tie Off, Press and Pull Test the Repair

Tie off on the inside, not at the edge. Take a small stitch through the garment only, pass the needle through the loop twice to make two half hitches, and pull them down flat against the cloth. Run the needle back under four or five stitches and cut the tail at 2 to 3 mm. That buries the end where friction cannot reach it, and a buried end is worth more than any knot.

Press the repair through a cloth with a warm iron, not a hot one. Polyester thread softens at around 150 C and the stitch loops flatten and lose their grip, so set the iron to the temperature the garment label gives and use a cotton cloth over the top. Hold for 5 to 10 seconds, lift rather than drag, and let the piece cool flat before you fold it.

Then pull test. Hook a finger under the stitched edge at each corner and lift with about the force of a full mug of coffee, which is roughly 1 kg. Nothing should move more than 1 mm and no stitch should show a gap. If one corner lifts, backstitch that corner before you go further, because the wash will finish the job.

Patches by Item: Denim, Backpack, Hat, Leather and Thin Knit

Denim is the easiest surface and the hardest on needles, and if the patch is meant to show rather than disappear, the jujizashi sashiko mending technique is the traditional way to make the stitching part of the design. Use a sharps 7 or a denim needle, a thimble, and short passes of no more than 3/4 inch at a time, because a long pass on heavy cloth bends the needle and the bend shows up as skipped stitches. Work through the seam allowance of a jeans leg by rolling the leg up and clamping it with a binder clip rather than pinning to yourself.

Hats and backpacks are an access problem rather than a stitching problem. A curved needle in 2 inch radius, or a straight needle worked from the inside of the bag through the open zip, reaches a back surface you cannot see. Go slowly, take the stitches at 1/8 inch and keep a finger behind the fabric as a depth gauge so you do not stitch the lining to the outside.

Leather needs holes before it needs thread. Mark the stitch line, punch through with an awl at 1/8 inch intervals, then stitch into the existing holes with a saddle stitch so the thread never cuts the grain. The full sequence is in the guide to sewing leather by hand, which covers the chisel spacing and the two needle method in detail.

A scout or uniform badge is the easiest kind of patch to sew well, because the border is already sealed and stiff. Take the stitches through the backing fabric only, just inside the embroidered rim, so the thread never crosses the design. On a sleeve, work the top half first and keep a small roll of card inside the sleeve as a backing so you cannot catch the other side.

Working Inside a Bag or a Lined Jacket

A lined jacket, a backpack and a padded bag all present the same problem: the surface to be patched is not the surface you can reach. There are three honest ways round it, and one dishonest one to avoid.

Release the lining along the nearest seam, stitch the repair on the outer layer only, then re-stitch the lining by hand. This is the correct method on a jacket with a bagged lining and it takes an extra twenty minutes.

Work blind with a curved needle from the inside, keeping a fingertip behind the outer fabric as a depth gauge. This is the method for a backpack where the lining cannot reasonably come out, and it works if the stitches are kept at 1/8 inch and the passes are short.

Use a backing card and stitch from the outside only, taking each stitch through the patch and the outer panel and stopping before the lining. On a thin panel this is risky, so test on a scrap of the same fabric first. What not to do is stitch straight through everything and hope: a repair that catches the lining leaves a pucker in the pocket, and unpicking it means cutting the thread blind, which risks the outer fabric as well.

Sewn Patch or Iron-On

An iron-on is a five minute job and a two wash job. The adhesive is a thermoplastic that softens every time the garment goes through a warm cycle, and the corner that creeps first is the corner on a curve, where the backing is under tension from the moment it is applied.

For the decorative version of the same method, our guide to visible mending and patch repair covers the stitches people use when the repair is meant to be seen. Sewing over a fused one is the sensible combination: fuse it to hold the patch exactly where you want it, then stitch the edge as you would any other. The fuse does the work of the pins, and the thread does the work of the repair. If you are stitching one that has already started to lift, warm it with the iron and press it back down before you stitch, so the edge is flat when the needle reaches it.

Five Faults and What Each One Means

Keeping a Patch on the Garment

Mending in general follows the same rule, and the guide to finishing raw edges covers what to do with a frayed edge that will not be covered by a patch at all.

Turn the garment inside out before it goes in the machine, which puts the wear on the seam allowances instead of on the stitch line, and use the mesh bag for anything small enough to lose or catch. Wash at 30 C rather than 40, because the temperature is what softens a fused edge and relaxes the thread.

Keep the dryer out of it. A tumble dryer is the single most destructive thing you can do to a hand repair: the heat relaxes polyester thread and the tumbling abrades the exposed stitch across the patch edge, and a repair that would have lasted years lifts in a season. Hang the garment, and if you must use the dryer, use the lowest setting and take it out while it is still damp.

Check the corners after every few washes. One that has begun to lift can be restitched in five minutes; one that has lifted and been washed three more times has taken the cloth around it with it.

Frequently Asked Questions

The Short Version: How to Sew On a Patch By Hand

A patch is a small repair with a large number of decisions inside it, and almost all of them are about contact: how deep each stitch reaches into the garment, how many stitches touch every inch of edge, and how many of them sit where the load actually goes. Work at 1/8 inch spacing with a doubled 18 inch thread, backstitch the corners, bury both ends on the inside and press through a cloth, and the patch will outlast the cloth around it rather than the other way round.

If the repair is a hole rather than a worn patch, put the cloth behind the tear and stitch the frayed edges down onto it, because a patch on the outside of thinning fabric is a race the thin fabric loses.

Tell me what you are patching, the fabric and whether it takes load, and I will tell you the needle, the spacing and whether the corners need backstitching. What are you repairing this week?

About This Guide

This guide follows the standard hand sewing method for applying a patch on woven and knit fabric. Every stitch count in the tables is calculated from the edge length at eight stitches to the inch, and the thread quantities assume a doubled 40 weight thread with one inch of slack per stitch. Where a figure is a working convention rather than a measurement we made, the text says so instead of presenting it as a test result.

Updated 6 November 2026.

Mithu has been repairing clothes by hand for 15 years and keeps a denim jacket on the back of her workroom door with a patch she stitched at 19, because the corner she refused to backstitch lifted after four washes and it is the reason every repair guide she writes starts with the corner.

All images in this article were created using AI.