Is a junior small the same as an adult small? Customer Service US November 14, 2017 08:51 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 fit my backprotector? Can I return or exchange my product? What Size forearm guards should I get? What does “W-S” measurement stand for? Did I get the right size Helmet? Comments 0 comments Article is closed for comments.