This design is the KIL Mask used for knife sparring, padded stick sparring and use with rattan sticks. This design is a KIL original. It could also be called a 3 weapon mask.
XL- for people who have trouble finding hats that fit them, usually guys 6'2. 200lbs
Large- Fits most males. I am 5'10 198, I wear a large, I can also wear a Medium(I wear a 7.5 in a hat)
Medium - for men just a bit smaller
Small - Women and kids