Girls Underwear Size 8 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Fruit of the Loom is the best-performing girls underwear size 8 brand in July 2026, moving 8,000 units across 4 ASINs for 50.0% of Top 10 volume. Hanes follows with 3,000 units (18.8%), ahead of BliBliTaTa on 2,000 units (12.5%).

With 6 brands splitting the Top 10 and 81.3% 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 $14.24 to $18.78, 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. Specifically, one ASIN forced its way in: B084DT4FY9 booked 1K units at $23.99, with ▲ 100.0% MoM change. On the growth side, B0G12V2N7J leads positive momentum with ▲ 400.0% MoM growth on 500 units, with B0BVGN7KLQ close behind at ▲ 300.0% MoM on 200 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.