How to Hem Jeans
Jeans are durable, but stacked seams, heavy denim, fading, stretch, and taper can make the hem more demanding than it appears.
Join Seamgrin’s Worker NetworkChoose standard or original hem
A standard hem creates a new finished edge. An original-hem method preserves the factory edge and its wear pattern, but it changes the construction and is not the same operation. Decide before cutting.
Match needle and thread to denim
Use a denim or jeans needle in a size suited to the fabric and machine. Test topstitching thread, tension, stitch length, and multiple layers on scrap or hidden allowance first.
Plan for thick intersections
Side seams can create a large height change under the presser foot. Press and grade bulk only when the construction permits it, and use a leveling tool or appropriate foot rather than forcing the needle.
Check taper and leg shape
Shortening tapered jeans moves the new opening to a wider part of the leg. The hem may fit differently around the ankle even though you did not alter the taper.
Press and inspect
Use heat suitable for the denim and any stretch fibers. Check that the leg did not twist, the topstitching is even, both openings match, and skipped stitches are corrected.
Frequently asked questions
Can I use regular thread to hem jeans?
Construction thread may work for some seams, while visible factory-style topstitching often uses heavier thread. Confirm what your machine and needle can handle.
Why does my needle break at the side seam?
The presser foot may tilt over a thick intersection, the needle may be too fine or bent, or the machine may be forced. Stop and correct the setup rather than pulling the fabric.
Does shortening jeans change the taper?
It does not reshape the leg, but the new opening may sit at a wider point on an already tapered leg.