Custom Sublimation Hats 12 Pack Set for Boys, Men - Bundle with 12 Trucker Hats with Foam Mesh 21.5-25.2 inches Adjustable Hat | Blank Baseball Hat for Men, Women. This baseball cap set includes 12 hats with a rear foam mesh for air ventilation and a polyester front. One Size Fits Most: Designed with an adjustable plastic snap closure, head circumference is about 21.5-25.2 inches/54-60 cm, fits most men and women. Freely decorate your own trucker cap as the canvas can be drawn on with any writing utensil, or freely slap on your very own design! 12 pack of truckers hats for him or her, comes with an adjustable strap to fit on most heads.