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? What is your return policy? What does “W-S” measurement stand for? Did I get the right size Helmet? What is the best lens for sunny/cloudy/foggy/night conditions? Comments 0 comments Article is closed for comments.