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

Blooming Jelly is the best-performing plus size swim brand in July 2026, moving 4,100 units across 4 ASINs for 45.6% of Top 10 volume. Lilosy follows with 1,500 units (16.7%), ahead of Daci on 1,000 units (11.1%).

With 6 brands splitting the Top 10 and 73.3% 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 $19.99 to $43.99, 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, 2 ASINs forced its way in: B0DLT3GTXD booked 800 units at $32.99, with ▲ 60.0% MoM change. On the growth side, B0FSXQV1XJ leads positive momentum with ▲ 100.0% MoM growth on 100 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.