Essential Mask Brace Sizes S, M, L from Fix the Mask

Bought online officially from Fix the Mask (mask brace for making surgical masks fit/work better) S and L are brand new, M I took out of packaging and took off that little 4 circles thing (compare S in photo 2 where it’s attached vs M in photo 3 where it’s not attached) but I couldn’t figure out how to use it so it has never been used. $5 for all, bought for $60 + shipping