✔️GREAT FIT: One size. With an elastic stretchy criss cross bands, the inner circumference of this hat measures approximately 22 inches, but it can adjust to measure anywhere between 20 and 24 inches, fitting several various head sizes. Brim length is approximately 2.75 inches. Easy to wear comfortably with a pony tail or messy bun. ✔️GREAT LOOK: Throw on your new FJ hat pony tail cap, gym shoes, yoga pants, and crop top to complete a perfect casual style. This classic style cap will go great with anything including your bathing suit on a sunny summer day!