Measure your head circumference using a flexible tape measure placed just above your eyebrows and ears, keeping the tape level all the way around. Match your measurement to Conner's size chart: Small (21 1/4-21 5/8 inches / 54-55 cm), Medium (22-22 3/8 inches / 56-57 cm), Large (22 3/4-23 1/4 inches / 58-59 cm), X-Large (23 1/2-24 inches / 60-61 cm), XX-Large (24 3/8-24 3/4 inches / 62-63 cm), XXX-Large (25 1/8 inches / 64 cm). If you fall between sizes, size up—most Conner raffia hats include an interior terry stretch band that allows you to fine-tune the fit. For the best fit, the hat should feel snug but not tight when new. Raffia naturally conforms to your head shape with wear, loosening slightly over the first few uses. If you're between sizes and prefer a hat that stays secure in wind, choose the smaller size; if you prioritize immediate comfort, choose the larger size and use the stretch band to tighten.