Size: Men, Ladies and Teens - One size fits most w/ Adjustable hook&loop back | Head measurement: 56 cm, 22", Size 7 ~ 59 cm, 23-1/4", Size 7-3/8) Brim: 2-3/4" Height: 5" | Ponytail cut out compartment: 3" x 1/2" - simply rubber band your hair up and slide in, adjust and tighten | Occasion: Everyday stable C.C blank plain adjustable hat with ponytail messy bun compartment, easy in easy out. Perfec