adidas Performance Adizero F50 Messi Shin Guard 30gm hard slip in shield for maximum protection Lightest TUV certified shield in the market Highly protective guard provides a feeling as if you're not wearing a guard Use height to determine shin guard size. Youth Sizing: Youth Small height range 2'7"- 3'2" Youth Medium height range 3'3" - 3'10" Youth Large height range 3'11" - 4'6" Youth X-Large height range 4'7 - 5'2" Adult Sizing: X-Small height range 3'11" - 4'6" Small height range 4'7" - 5'2" Medium height range 5'3" - 5'9" Large height range 5'10" - 6'1" X-Large height range 6'2" -6'5" Part of the Lionel Messi Soccer collection This is a 2 part guard: a compression sleeve with a slip in shield that fits inside the sleeve Compression techfit sleeve with shield pocket feels as if you're not wearing a shin guard Shin Guard sizing: X-small height range 3'11"-4'6", Small height range 4'7"-5'2" Shin Guard sizing: Medium height range 5'3"-5'10", Large height range 5'11"-6'2", X-Large height range 6'3+