WIDE BRIM: The front brim is 4.7 inches and the back brim is up to 5.9 inches at its widest point. This design effectively shades your face and neck without blocking your view.ONE HAT FITS MOST: This bucket hat fits head sizes between 55-57cm/21.65''-22.44'', US Size: 6 7/8-7 1/8. The chin strap is adjustable, making sure that your hat stays in place on windy days.REVERSIBLE: Both sides of the sun hat are wearable, with different colors. You only need to detach the drawstring and reverse the hat to the other side, then hook up the drawstring again.UPF 50+ SUN BLOCK: Protects your eyes, face and neck from harmful UV, lowering the temperature under the brim, gives you a cool and skin-healthy wearing experience.LIGHTWEIGT AND PORTABLE: This travel-friendly foldable sun hat can be simply tossed in your beach bag or travel baggage. It won't take much space. It smoothly goes back in shape after being folded!