Plus Size Summer Pants Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Sampeel is the best-performing plus size summer pants brand in July 2026, moving 20,000 units across 6 ASINs for 83.7% of Top 10 volume. WIHOLL follows with 1,000 units (4.2%), ahead of CHICME on 1,000 units (4.2%).

With 5 brands splitting the Top 10 and 92.1% 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 $23.66 to $25.99, 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: B0G14PKJ42 booked 1K units at $25.99, with ▲ 11.1% MoM change. On the growth side, B09PPY22KJ leads positive momentum with ▲ 200.0% MoM growth on 300 units, with B0CXPTGMKL close behind at ▲ 150.0% MoM on 500 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.