The two pocket types and which one to choose
Pants pockets come in two main styles: patch pockets, which sit on top of the fabric and are visible from the outside, and inseam pockets, which are sewn into the side seam and hidden inside the pants leg. Patch pockets are easier for a first attempt because you sew them flat to the finished pants. Inseam pockets require planning before you cut the fabric, so they work best if you are making pants from a pattern or replacing a pocket in pants you already own.
For repairing torn pockets or adding pockets to existing pants, patch pockets are your practical choice. For new pants or when you want pockets that feel seamless, inseam pockets are worth the extra steps. This guide covers both, starting with patch pockets because the technique is simpler and the tools are fewer.
Key Takeaways
- Patch pockets are sewn on top of finished pants and need a reinforced top edge and corner stitching to prevent tearing.
- Inseam pockets are built into the side seam before the pants are assembled, so they require a pattern or careful marking on fabric you have not yet cut.
- A pocket bag (the hidden part inside the pants) should be made from lightweight cotton or lining fabric, not the same weight as the outer pants.
- Backstitching at the start and end of every seam, plus a box stitch at the top corners, keeps pockets from ripping open under stress.
- Test your pocket opening on scrap fabric first to check that your seam allowance and stitch length work before sewing on the actual pants.
Sewing a patch pocket from start to finish
Cut your pocket piece from the same fabric as your pants, adding a half-inch seam allowance on all sides. If the pocket is rectangular, cut it about 5 to 6 inches wide and 6 to 7 inches tall—large enough to hold a phone or wallet but not so large that it pulls the pants out of shape. Fold the top edge down half an inch, wrong sides together, and press it with an iron to crease the fold line.
Fold that same edge down another half inch and press again. This double fold hides the raw edge and creates a finished top. Sew along the bottom of this fold with a straight stitch, using a stitch length of 2.0 to 2.5 millimeters. Backstitch at the beginning and end. This reinforced top edge is what keeps the pocket from tearing open when you reach in.
Now fold the remaining three sides of the pocket inward by half an inch and press them flat. The pocket should now look like a neat rectangle with all raw edges folded inside. Pin it to the pants leg where you want it—usually about 2 to 3 inches down from the waistband and centered on the front thigh. Sew around all four sides of the pocket, staying about a quarter inch from the edge. Backstitch at the start and end.
At the top two corners, sew a small box or X shape to lock the stress point. Start at the top corner, sew down about half an inch, across a quarter inch, back up, and across again to form a small square. This reinforcement is the difference between a pocket that lasts and one that tears at the corner within a month.
Building an inseam pocket into the side seam
Inseam pockets are part of the pants construction, so you need to mark them on your fabric pieces before you sew the side seam. If you are using a pattern, it will show you where to cut the pocket opening. If you are adding a pocket to existing pants, measure the opening you want—usually 4 to 5 inches long—and mark it on the front and back panels with tailor's chalk or a fabric pen, about 2 to 3 inches down from the waistband.
Cut two pocket bag pieces from lightweight cotton or lining fabric. These should be about 8 inches wide and 10 inches tall. Place one pocket bag piece against the front pants panel, right sides together, and align the top edge of the bag with the marked pocket opening. Sew along the opening line with a straight stitch and a 5/8-inch seam allowance. Backstitch at both ends.
Fold the pocket bag down and press the seam flat. Now place the second pocket bag piece against the back pants panel, right sides together, and sew it the same way. When you sew the side seam of the pants later, the two pocket bag pieces will be caught in that seam and held together, creating a closed pocket pouch inside the pants leg.
Choosing the right fabric for pocket bags
The pocket bag is the hidden lining that forms the actual pocket pouch. It takes a lot of wear—your hand goes in and out dozens of times a day—so it needs to be durable but not stiff. Cotton voile, cotton lawn, or lightweight cotton lining are all good choices. Do not use the same heavy fabric as your pants outer layer, because the extra bulk will create a lumpy seam and the pocket will not lie flat.
If you are repairing a pocket in existing pants, you can use an old cotton sheet or the back of a worn-out garment. The fabric does not show, so appearance does not matter. What matters is that it is soft enough to fold without creasing permanently and strong enough to hold up to repeated use.
Fixing a torn pocket without removing the pants
If a pocket has torn at the corner or along the seam, you can reinforce it from the inside without taking the pants apart. Turn the pants inside out and locate the tear. Cut a patch from lightweight fabric about an inch larger than the tear on all sides. Place the patch over the tear, right side down, and sew around all four edges of the patch with a straight stitch and a 2.0-millimeter stitch length.
This creates a reinforced area that spreads the stress across a wider space. If the tear is at the corner where the pocket meets the seam, sew a small box stitch (as described in the patch pocket section) right over the damaged area. Turn the pants right side out and test the pocket by putting your hand in and out a few times to make sure the repair holds.
Common mistakes and how to avoid them
The most common mistake is sewing the pocket opening too close to the waistband. If the pocket sits higher than 3 inches down, your hand will bump the waistband every time you reach in, and the pocket will pull the pants out of shape. Measure down from the waistband before you pin, and mark the spot with a pin or chalk line.
The second mistake is using a stitch length that is too long. A stitch length above 3.0 millimeters looks loose and will not hold under stress. Use 2.0 to 2.5 millimeters for pocket seams. The third mistake is skipping the reinforcement at the top corners. A straightforward box stitch takes 30 seconds and prevents a $40 repair bill later.
Finally, do not sew the pocket bag to the pants leg itself. The pocket bag should be sewn only to the opening edge and then caught in the side seam. If you accidentally sew it to the leg fabric, the pocket will not open properly and your hand will catch on the stitches.
Testing your pocket before wearing the pants
Before you wear the pants, put your hand in the pocket 20 to 30 times. Reach in, pull out, and repeat. Listen for any popping or tearing sounds. If you hear stitches breaking, the seam allowance was too small or the stitch length was too long. If the pocket pulls away from the pants, you did not backstitch at the start and end of the seam.
If the pocket feels lumpy or the opening does not lie flat, the pocket bag fabric is too heavy or the seam allowance is too wide. These are all fixable problems on a test pair. Once you know what works, you can sew pockets on your next pair with confidence.
Frequently Asked Questions
Can I add a pocket to pants that don't have one?
Yes, a patch pocket is the easiest option. Sew it on top of the finished pants using the method described above. An inseam pocket requires opening the side seam, which is more involved but possible if you are comfortable unpicking stitches and resewing the seam afterward.
What stitch should I use for pockets?
A straight stitch is standard and strong enough for all pocket seams. A zigzag stitch is not necessary unless you are sewing on stretchy fabric. Use a stitch length of 2.0 to 2.5 millimeters and backstitch at the start and end of every seam.
How deep should a pocket be?
A pocket bag should be at least 1 to 2 inches deeper than the opening to prevent your hand from hitting the bottom. For a 5-inch opening, make the bag 7 to 8 inches tall. This gives you room to reach in comfortably without the pocket feeling too deep or bulky.
Why does my pocket tear at the corner?
Corners are stress points where the seam changes direction. Without reinforcement, the stitches pull apart. Sew a small box or X stitch at each top corner to spread the stress across a wider area and lock the seam in place.
Can I use the same fabric for the pocket bag as the pants?
You can, but it will create bulk and the pocket will not lie flat. Lightweight cotton or lining fabric is better because it folds easily and does not add thickness to the seam. Save the heavy fabric for the outer layer where it shows.