Both Gill and Zhik make junior specific sailing gear, though each brand uses a slightly different sizing chart and scale for assigning junior sizing. Typically, Gill 'junior specific' gear is available in sizes Junior S - Junior L, which roughly correlates to a kids 8, 10, and 12. The brands Ronstan, Stohlquist, and WinDesign follow a similar convention. Zhik sizing now includes a fourth size, so their range is Junior XS - Junior L, with kids 8-14. Wre understand this can be confusing, so our best advice is to please consult size charts on specific products for more information before making a sizing decision for your junior sailor.