EUC- only tried on Size S/M: fits between 22-22.75" / 56-58cm Meet our Ultra Wide Cotton Linen Hat: our best-selling ultra wide style, designed in a premium, soft and breathable cotton-linen fabric. Offering unbeatable shade to your face, neck, eyes and shoulders thanks to its generous front brim length of 5" and back brim of 6", this wardrobe staple can be customized to suit your style with its internal brim wire. It also features a discrete ponytail opening at the back and detachable chin strap, and is adjustable to suit different head shapes.