One Size Fits Most (OSFM): Hey, don't worry, we got you covered – literally! Our OSFM size is designed to fit most heads comfortably. Snapback Closure: Adjust it to your liking, and keep your hat game strong with the snapback closure. Because we know fit matters. So, there you have it, folks! The Richardson 112 Trucker Hat, brought to you by Wooder Boy Productions. The perfect Fathers Day gift for any Dad out there. All sales are final. This is a custom product.