شريط مطاطي للخصر عالي التمدد 1-1/2 بوصة، أسود، 1-1/4 ياردة

That stiff, strong stretch is exactly what I needed for the jacket waistband I was fixing. It doesn't roll or fold over like the softer stuff does, and 1-1/4 yards was plenty for my project with a bit left over.

I used this to stabilize a heavy denim waistband and it holds the shape way better than the flimsy stuff I tried before. The stiffness is the whole point here, so it's not the elastic for a soft gathered skirt, but for a jacket cuff it's perfect.

I used this for the cuff bands on a heavy fleece jacket and it holds its shape perfectly, no sagging after weeks of wear. Just measure carefully since it barely gives, and you're set.