Uploaded April 2026 | Updated September 2026, 2 weeks ago

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Denim has a reputation for being difficult, and honestly it's not entirely undeserved. But most of the frustration comes from a few fixable mistakes, not the fabric itself.

Here's what actually makes the difference:

- Match your needle size to your fabric weight: 90/14 for lightweight, 100/16 for midweight, 110/18 or higher for heavyweight.
- Use a fresh rotary blade for every project because denim dulls them fast.
- Pre-wash everything — denim can shrink up to 10% and bleed dye badly.
- Lengthen your stitch to around 3mm to prevent puckering.
- Press with your highest heat setting and a wooden clapper for seams that actually lie flat

Get the FREE Denim Cheatsheet here: promo.seamwork.com/denim-cheatsheet/?utm_source=youtube&utm_medium=video&utm_campaign=denim-guide&utm_content=04222026