S size: Head Circumference 4854cm. M size: Head Circumference 5558cm. The item "BN Kids/Adults New MMA Muay Thai Boxing Helmet WithMask Taekwondo Martial Arts Spa" is in sale since Sunday, April 28, 2019. This item is in the category "Sporting Goods\Boxing, Martial Arts & MMA\Protective Gear\Head Gear". The seller is "fourwindsmartialarts" and is located in Eastpointe, Michigan.This item can be shipped to United States.