Toddler Underwear Boys 4t Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Pull-Ups is the best-performing toddler underwear boys 4t brand in July 2026, moving 34,000 units across 6 ASINs for 54.0% of Top 10 volume. Pampers follows with 23,000 units (36.5%), ahead of Hanes on 6,000 units (9.5%).

With 3 brands splitting the Top 10 and 100.0% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $14.00 to $42.34, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B0CRSQBGVY leads positive momentum with ▲ 166.7% MoM growth on 800 units, with B0CGFCYRPX close behind at ▲ 150.0% MoM on 1K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.