Chambray is a light plain-weave cotton with a coloured warp and a white weft, which is why it looks like denim and behaves like a shirting.
Use a universal 80/12 with a stitch length around 2.5 mm. It is a stable, easy woven and needs nothing unusual.
Prewash it. Cotton chambray shrinks on the first wash and darker chambray can lose a little dye in the first cycle or two. Wash before cutting, and wash a new garment separately the first time.
It is lighter than it looks. People choose chambray expecting denim weight and then wonder why a garment is unstructured. It is shirting weight. Interface collars, cuffs and plackets, and stabilise pocket openings and any button band.
Topstitch it. The denim-like appearance rewards visible topstitching, and this is where chambray looks best. Use topstitch thread with a topstitch needle, or two passes with ordinary thread, and lengthen to 3 to 3.5 mm.
Finish the edges. It frays moderately. Flat-felled seams suit it particularly well and reinforce a light fabric at the same time.
Press with a hot iron and steam. It takes it and it holds a crease.
Watch the grain. The two-colour weave makes any off-grain cutting visible as a shift in shade down a finished piece, in the same way corduroy shows nap.
Questions people actually ask
Is chambray the same as denim?
No. Denim is a twill; chambray is a plain weave and usually much lighter. They share the coloured-warp-and-white-weft construction, which is why they look related.
Does chambray need a jeans needle?
No. A universal 80/12 is right. A jeans needle is heavier than a light plain weave wants.
Last reviewed 2026-08-11