One size fits all with twill elastic back, 4” brim for full sun shade and 20" circumference unstretched (Sizes can vary 1/2-in) 100% HANDMADE, HANDWOVEN, AND SUSTAINABLE: Made from 100% natural fibers by female-majority weaving collectives in the Eastern part of Indonesia. Handmade so no two are alike. Due to the use of natural fibers, the visor is not made to be used or submerged in the water