Is a junior small the same as an adult small? August 06, 2019 15:01 Updated Follow Yes, across our entire line a size small will have the same fit whether it’s an Adult Small or a Junior (mini) Small. Related articles How do I size myself for a helmet? What Shinguard size should I get? Can I cut or modify my shinguards? What does “W-S” measurement stand for? Can I adjust a helmet’s fit? Comments 0 comments Article is closed for comments.