How To · Fashion · Build
Tailor Your Own Denim: Hemming, Taking In, and Stacking
A well-fitted pair of jeans starts with the right length and silhouette. Learn to hem, taper, and stack your denim like a tailor—no sewing machine required for some techniques.
5 min read · IrisDenim tailoring is less mystical than it seems. Whether your jeans pool at your ankles, gap at the waist, or need intentional breaks at the hem, three core alterations will transform fit. The good news: you can execute all three at home with basic tools and patience.
This guide covers hemming (the most common fix), taking in the waist (for that perfect snug feel), and stacking (the deliberate bunching that defines certain silhouettes). Each technique builds on basic measuring and pinning skills. No sewing machine? We'll show you alternatives.
Denim tailoring is less mystical than it seems—and you can do it at home.
What you'll need.
- 01Measuring tape
- 02Fabric pen or tailor's chalk
- 03Straight pins
- 04Scissors or pinking shears
- 05Sewing machine or needle and thread
- 06Matching thread
- 07Fray Check or fabric glue (optional)
- 08Flat work surface or cutting mat
Step one · 5 minutes
Measure and mark your ideal hem length
Put on the jeans with the shoes you'll wear them with most. Stand in front of a mirror and decide where you want the hem to hit—typically at the top of your shoe or just grazing it. Have someone mark the desired length with a fabric pen or tailor's chalk, or use a full-length mirror and mark it yourself. Measure from the crotch seam down to your marked point on both legs to ensure they're equal. Repeat on the inside of each leg for accuracy.
Sit down in your marked jeans—the hem should still feel comfortable and not pull. This accounts for how fabric shifts when you bend.
Step two · 8 minutes
Pin the hem fold and try on
Turn the jeans inside out. Fold the excess fabric up to your marked line and pin horizontally every 2 inches around the entire hem. The pins should hold the fold in place without bunching. Try the jeans on inside-out to verify the length feels right when you're standing and sitting. Walk around your home for a minute—this is your final check before committing to the cut.
Pin from the inside; this prevents marks on the outside and gives you a clearer view of the fold line.
Step three · 10 minutes
Cut and finish the hem edge
Remove the jeans and lay them flat on a cutting surface. Cut off the excess fabric about ½ inch below your pin line, leaving room for a finished edge. If you have a serger or sewing machine, zigzag-stitch the raw edge to prevent fraying. If not, use pinking shears to cut a zigzag pattern along the edge, or apply a thin line of fabric glue (like Fray Check) to seal it. Let glue dry completely before handling.
Denim frays aggressively; finishing the edge extends the life of your hem significantly.
Step four · 12 minutes
Stitch or glue the hem permanently
Fold the hem up to your pin line again. If you're using a sewing machine, thread it with matching thread and stitch a straight line ¼ inch from the fold, removing pins as you go. Use a medium stitch length and backstitch at the start and end. If hand-sewing, use a ladder stitch (also called an invisible stitch) for a seamless look—thread your needle, knot the end, and slide it inside the fold, bringing it out every ¼ inch and crossing through the outer fabric. For a no-sew option, apply fabric glue along the fold, press firmly for 30 seconds, and let cure for 24 hours before wearing.
Match your thread color exactly—even a slightly off shade shows on denim. Test on scrap fabric first if you're new to machine sewing.
Step five · 5 minutes
Take in the waist (optional taper)
If your jeans gap at the waist, you can take them in at the side seams or center back seam. Try them on inside-out and pinch the excess fabric evenly on both sides—typically ¼ to ½ inch per side. Pin a new seam line and try them on again. The fit should be snug but not restrictive. Sew along your pinned line using a straight stitch, then try them on right-side-out to confirm. Trim excess seam allowance to ¼ inch and finish the edge with a zigzag stitch or Fray Check.
Taking in more than ½ inch per side can distort the pocket placement and overall silhouette. Small adjustments are always safer.
Step six · 5 minutes
Create intentional stacks (optional styling)
Stacking—deliberate bunching at the hem—is a design choice, not a mistake. For a relaxed stack, hem your jeans 1 to 2 inches longer than your natural break and let the excess fabric bunch naturally at the shoe. For a more sculpted stack, fold the hem up ½ inch, then fold again ½ inch, creating a double cuff that sits above your shoe. Pin and stitch both folds for a structured look. Try on and adjust the fold depth until the stack complements your leg shape and shoe style.
Stacks work best on straight-leg or relaxed-fit silhouettes. Skinny jeans typically don't have enough fabric to stack visibly.
How to know your tailoring worked
Properly tailored denim feels intentional, not accidental. Your hem should hit consistently on both legs, your waist should sit comfortably without gapping or pinching, and any stacks should fall naturally with your stride. Wear your jeans for a full day before declaring the alteration complete—denim relaxes slightly, and you'll want to confirm the fit holds.
Questions at the mirror.
My hem came unstitched after one wash. What went wrong?
Denim moves a lot, and thread tension matters. If hand-sewing, use a ladder stitch and backstitch frequently. If machine-sewing, use a medium stitch length (not too tight, not too loose) and backstitch at the start and end. Always finish the raw edge first—an unfinished edge frays and weakens the stitch.
I took in the waist but now the pockets feel weird. Can I fix it?
Taking in the side seams shifts pocket placement slightly. If the pockets feel uncomfortable, you may have taken in too much. Let out the seam by ¼ inch and re-stitch. For future alterations, take in no more than ½ inch per side to minimize pocket distortion.
The hem looks puckered on the outside. How do I prevent this?
Puckering usually means your stitches are too tight or your fabric is bunched under the presser foot. Use a medium stitch length, keep tension even, and guide the fabric gently (don't pull). If it's already done, you can carefully pick out the stitches and re-sew with looser tension.
Can I tailor stretch denim the same way as rigid denim?
Mostly yes, but stretch denim requires a slightly different approach. Use a ballpoint needle (not a standard needle) to avoid snagging fibers. Reduce machine tension slightly and use a slightly longer stitch length. Stretch denim also relaxes more after washing, so be conservative with waist adjustments.