Fit & Design: Brim flips up or down for 2 ways to wear Adjustable drawstring for a customizable fit Lightweight Hidden magnet for your ball marker Regular size: 56 cm circumference Large size: 59 cm circumference If you are in between sizes, we recommend purchasing the large size because you can tighten the hat as much as you want! The brim size does not change, only the inner circumference of the hat Technology: Wind resistant Moisture wicking Additional Details: Care Instructions: 1. Place hat in a zippered laundry bag that is made for the wash 2. Wash in cold water on a delicate cycle (you can use liquid or powder detergent) 3. After wash cycle is complete, reshape, and let the hat air dry Your hat will maintain its shape! Stainless steel/anti-rust ball markers are also recommended