The most popular sizes of these products are 6-12 Month, 12-24 Month, 2-4 Year, 0-6 Month, 5-6 Years, 8-9 Years, 6-7 Years, 7-8 Years, 9-10 Years, 11-12 Years, 9-12 Months, 12-18 Months, 0-3 Months, 3-6 Months, 6/9 Months, 4-6 Year, 6-8 Year, 3M, 6M, UNI, ONE SIZE a 9M. All sizes