WILL NOT FIT COWBOY HATS! UNIVERSAL SIZE: Outer Dimensions are 15"L X 13"W X 6"H. Max Brim Size: 14.5" X 12.5". Max Crown Size: 8.75"L X 6.75"W X 4.25"H DESIGN: Designed by leading worldwide hat distributors to ensure your satisfaction with this product. DURABLE: This water resistant Travel Hat Box is designed to withstand travel through airports, train and bus stations, and your day to day car ride. STORAGE: Safely store your hat in this hat box, as your hat will receive the proper support and will retain its shape. MULTI PURPOSE: Can be worn as a backpack or shoulder bag. Can also be placed on carry on handles and is compact enough to fit inside a suitcase. Outer Dimensions are 15"L X 13"W X 6"H. Max Brim Size: 14.5" X 12.5". Max Crown Size: 8.75"L X 6.75"W X 4.25"H