Term

Seam allowance

Seam allowance is the extra fabric inside a seam, which determines how much a garment can be let out. A dress with generous seam allowance can often be enlarged slightly, while one with little cannot, which is why taking a dress in is much easier than letting it out. Ask a tailor to check the seams before you buy if you may need extra room. Beaded and lined dresses often limit what can be changed. See also: Alterations, Bodice, Hem, and the guide Dress Alterations Guide: What to Expect and How to Prepare.