Adding pockets to leggings is one of those small sewing changes that makes the garment far more useful without changing the way it feels to wear. The real challenge in how to add pockets to leggings is keeping the fit smooth, the pocket opening stable, and the bulk low enough that the fabric still moves properly. In this guide, I cover the pocket styles that actually work, the measurements I start from, and the cleanest way to sew them into both existing and newly drafted leggings.
The practical essentials before you cut anything
- Side-seam inset pockets are usually the cleanest choice for leggings because they sit flat and disappear when empty.
- A useful starting point is a pocket opening of about 15-16 cm with a pocket bag deep enough for a phone, usually 22-28 cm.
- Use a ballpoint needle, a stretch stitch or narrow zigzag, and a pocket fabric with good recovery.
- Lightweight fusible interfacing at the opening helps stop soft knits from stretching out of shape.
- If the leggings have no side seam, a curved side panel or back waistband pocket is often a better solution than a bulky patch pocket.
Which pocket style works best for leggings
I rank leggings pockets by how much they disturb the drape. That matters more than most people expect, because leggings rely on negative ease - meaning the garment is drafted slightly smaller than the body so the stretch does the work. In other words, there is very little room for a clumsy pocket to hide.
| Pocket style | Best for | Bulk | My take |
|---|---|---|---|
| Side-seam inset pocket | Everyday leggings, gym leggings, phone carry | Low | The best all-round option and the easiest to keep discreet |
| Curved side-panel pocket | Seam-free leggings or patterns that need a shaped opening | Low to medium | Excellent when there is no obvious side seam to hide the pocket in |
| Back waistband pocket | Keys, cards, gels, a light phone | Very low | Useful for activewear, but not as easy to access as a side pocket |
| Patch pocket | Lounging leggings or thicker ponte-style knits | Medium to high | I only use this when the look is intentionally casual or sporty |
If I had to choose one method for most pairs, I would pick the inset side-seam pocket. It looks neat, it is comfortable when you sit down, and it is far less likely to warp the leg than a slapped-on patch pocket. Once you know which style suits the fabric, the next step is checking the material and pattern before you cut.
What I check before I cut into the fabric
Before I touch a rotary cutter, I check three things: stretch, recovery, and seam allowance. Recovery is how well the fabric springs back after it has been stretched. If recovery is poor, the pocket opening can grow wider with wear and start to sag.
- Fabric stretch - the leggings fabric should stretch comfortably enough to keep its shape once the pocket is added.
- Recovery - if the fabric stays baggy after you stretch it, expect the pocket to droop too.
- Seam allowance - match the pattern exactly; many leggings patterns use 1 cm or 3/8 in, and mixing allowances is where a lot of amateur hacks go wrong.
- Needle and stitch - a ballpoint needle slides between knit loops instead of cutting them, and a stretch stitch or narrow zigzag moves with the fabric.
- Pocket depth - for a phone pocket, I like the pocket bag to be at least 5 cm deeper than the phone itself.
I also test the placement on the body. Hold the front legging piece against the wearer, bend the knee, sit down, and imagine sliding a hand into the pocket. If the opening lands too far below the hip curve, the pocket becomes awkward to reach and visually heavy. A pocket that feels natural standing up should still feel natural when you are walking, driving, or crouching.
Once those basics are right, the sewing itself is straightforward, and the cleanest version starts with an existing side seam.
How I add side-seam pockets to an existing pair
This works best if the leggings already have a side seam. If they do not, skip to the next section and use a curved panel or waistband option instead. For a simple retrofit, I usually allow 30-60 minutes for the first pocket once the shape is drafted; after that, the second side goes faster.
- Mark the pocket position. I place the top of the opening where the hand naturally falls, usually just below the hip curve rather than halfway down the thigh.
- Draft the pocket bag. Trace around a phone or your hand, round the lower corners, and add seam allowance around the sides and bottom. Keep the top edge aligned with the legging side seam.
- Cut mirrored pieces. You need four pocket pieces for a pair of side pockets - two for the left side and two for the right.
- Reinforce the opening. Fuse a narrow strip of lightweight interfacing over the pocket opening on the wrong side. I keep it slim, because heavy stabiliser creates a ridge on stretchy fabric.
- Finish the raw edges. Use an overlocker or a zigzag stitch before the pocket is assembled. It is easier to tidy the edges while the pieces are still flat.
- Stitch the pocket to the front and back. Place right sides together, sew the straight edge of the pocket to the side seam, then press the pocket away from the garment.
- Understitch if the fabric is soft. Understitching is a row of stitching close to the seam that helps the pocket stay tucked inside instead of rolling outward.
- Close the side seam and pocket curve in one pass. Use a stretch stitch or narrow zigzag, pivoting smoothly around the pocket curve. Keep your seam allowance consistent from top to hem.
I always do a quick wear test before I finish both sides completely. Put a phone or a similar weight into the pocket, sit down, and move around. If the opening gapes, it is usually too low, too wide, or too lightly stabilised. If the pocket feels fine empty but pulls once loaded, deepen the bag before you sew the second side.
How I build pockets into a new leggings pattern
When I am working from a fresh pattern, I add the pocket before I cut the fabric. That gives me cleaner lines and saves me from forcing a pocket into a seam that was never designed for one. It also makes it easier to keep both sides identical.
- Trace the front and back legging pieces so you can test the pocket shape on paper first.
- Mark the natural hand entry point on the side seam, then raise it slightly if the wearer prefers the pocket higher on the hip.
- Keep the pocket bag smooth. A pocket that is too square at the top tends to show through the leg.
- Make the bag deeper, not wider. Depth carries a phone better than a broad upper edge, and it keeps the silhouette cleaner.
- Match seam allowance exactly. If the pattern uses 1 cm seam allowance, do not switch to 6 mm on one part and 1 cm on another.
- Choose pocket fabric with the right behaviour. I usually prefer a slightly more stable knit or mesh for the pocket bag, because a limp scrap can distort the leg line.
If I am drafting for a phone pocket, I start around 15-16 cm for the opening and 22-28 cm for the bag depth, then adjust for the actual device and the wearer’s preference. That range is usually enough for a phone with a case, but I would still check the exact fit before cutting the final pair. A pattern that includes the pocket from the beginning will always look more polished than one that has been patched on afterwards.
What to do when there is no side seam to work with
Some leggings are cut with a very clean outer line and almost no visible side seam. That looks sleek, but it removes the easiest place to hide a pocket. In that situation, I would not force a classic jeans-style pocket onto a very tight legging unless the fabric is substantial enough to support it.
My usual options are:
- Curved inserted side pocket - the best workaround if you are willing to alter the pattern pieces. It keeps the pocket integrated with the leg rather than sitting on top of it.
- Back waistband pocket - useful for cards, keys, or a slim phone, and often the least visible option.
- Patch pocket - fine for lounge leggings or heavier knit trousers, but I avoid it on true compression leggings because it can distort the surface.
If you are deciding between a back pocket and a side pocket, think about what will actually go into it. I like the back waistband option for small essentials, but for a mobile phone or anything you need to reach quickly, the side pocket is still more practical. That choice becomes even clearer once you know the common mistakes that spoil the finish.
The mistakes that make pockets feel clumsy
Most bad leggings pockets fail for the same few reasons. The pocket itself is not the problem; the problem is usually placement, fabric choice, or skipping reinforcement.
| Problem | What usually caused it | Better fix |
|---|---|---|
| The pocket pulls the leg outward | The bag is too wide or the fabric is too heavy | Narrow the opening and use a lighter pocket fabric |
| The opening stretches out after a few wears | No interfacing or unstable knit at the top edge | Fuse a slim stabilising strip before assembly |
| The pocket feels shallow and useless | The bag depth was copied from trousers instead of leggings | Deepen the bag by at least a few centimetres |
| The pocket twists or sits oddly flat | Front and back pocket pieces do not match cleanly | Check notches, top points, and seam allowance before sewing |
| Stitches pop when the leggings stretch | Straight stitch used on a knit seam | Switch to a stretch stitch or narrow zigzag |
Most of these problems come from treating leggings like woven trousers. They are not the same construction at all. Jeans can hide more structure, more topstitching, and more pocket weight; leggings need a lighter hand and a more careful fit. Once you respect that difference, the pocket becomes an asset instead of a distraction.
The pocket method I would sew first
If I were making one pair today, I would start with a side-seam inset pocket on a stable four-way stretch knit. That gives me the best balance of comfort, storage, and a clean silhouette. I would keep the opening high enough to reach easily, deepen the bag for a phone, and reinforce the opening lightly rather than overbuilding it.
For the neatest result, I would also make a quick test pocket from scrap fabric before cutting the final pair. That one small mock-up tells me whether the opening sits in the right place, whether the bag needs to be deeper, and whether the pocket fabric is too bulky for the leggings. Once you have a pocket template that suits your body and your phone, you can reuse it on future pairs and the whole job gets faster every time.
