Sterkowski 100% Linen Summer Ivy League Flat Cap To measure your head size get a soft tape measure. Measure around your head above your ears and eyebrows where your hat would normally sit. If your head size falls between two sizes, we recommend that you choose the larger size of the two. If you like loose fit, then please adjust the soft measuring tape in a loose way. 100% linen cloth Cotton sweatband Mesh lining to reduce moisture and increase air circulation Traditional sewing technique and classic pattern