Glossary

Sewing pattern glossary

Short explanations of common terms used across the pattern generators, previews, and exported files.

Seam line

The line where two pieces are intended to be sewn together. In previews it is usually the solid construction outline.

The outer line used for cutting fabric after adding seam or hem allowance.

Extra fabric added outside the seam line so pieces can be sewn and finished.

Extra fabric at a lower edge, such as pants or shorts hem, used for folding and finishing.

A guide showing how to align the pattern piece with the fabric grain.

A folded wedge that removes excess fabric and shapes the garment around the body.

The curved seam area in pants and shorts that connects the front, back, and inner leg.

The inner leg seam from crotch to hem on pants or shorts.

The side seam from waist to hem on pants or shorts.

Additional room beyond body measurements for movement, comfort, and fabric behavior.

The opening where a sleeve is sewn into a bodice or T-shirt.

A separate strip sewn around a neckline, common on T-shirts and knit tops.

The curved top of a sleeve that is sewn into the armhole.

The opening around the neck, such as round, deep round, or V-shaped.

A small mark used to match pieces accurately while sewing.

A line showing where fabric should be folded, often used for hems, cuffs, bands, or center-fold pieces.

A trial version sewn from inexpensive fabric to check fit before cutting final fabric.