The fedora hat's brim is usually wide, approximately 2.5 inches (6.4 cm) wide, but may be wider,[1] can be left raw-edged (left as cut), finished with a sewn overwelt or underwelt, or bound with a trim-ribbon. Stitched edge means that there is one, two, or more rows of stitching radiating inward toward the crown. The Cavanagh edge is a welted edge with invisible stitching to hold it in place and is a very expensive treatment that can no longer be performed by modern hat factories.[4] Fedora hats are not to be confused with small brimmed hats called trilbies.[2][5]