Personally I think it runs just little small but it is a one size.

Introducing the Richardson Oregon State Cap, Model No. 112, a stylish and adjustable baseball cap perfect for men who want to show off their college pride. Made with high-quality materials and featuring the logo of Oregon State, this hat is a great addition to any fan's wardrobe. With its snap-back feature, this cap can fit men of all sizes and provide a comfortable fit for everyday wear. The vibrant orange color of the cap is sure to make a statement, and the features of the hat, like its adjustability and college theme, make this cap a must-have for any fan of Oregon State. Get your Richardson Oregon State Cap Model No 112 Snap Back Adjustable Hat today!