The KD-131 Hat Box is a great product made for carrying or protecting hats or helmets. This hat case is the original K&D hat can. It will fit up to a 4 1/4" tall hat, and comes with a mirror and the option of an accessory case. 

Dimensions Bottom of Case: 16 inches by 14 inches. Fits 2-3 hats!

These can have been proven to be tough and durable to ease your mind when traveling or just storing hats.