The most popular sizes of these products are M, L, S, XL, 2XL, 5-6 Years, 4-5 Years, Kids, 3 YEARS, 3-4 Years, 18/24 Months, 18-24 Mo, ONE SIZE, 6/9 Months, 9-12 Months, 3-6 Months, 12-18 Months, 10Y, 12Y, 3 Toddler, 4 Toddler, 8Y, 2 YEARS, 14Y alebo 6-9 Mo. All sizes