Boyshort Bikini Set Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

UNDER THE SEA is the best-performing boyshort bikini set brand in July 2026, moving 6,000 units across 1 ASIN for 53.1% of Top 10 volume. Blooming Jelly follows with 1,100 units (9.7%), ahead of Tempt Me on 1,000 units (8.8%).

With 8 brands splitting the Top 10 and 71.7% 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 $8.49 to $33.32, 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: B0DL9Z5HH4 booked 400 units at $36.99, with ▲ 33.3% MoM change. On the growth side, B0GJYD5273 leads positive momentum with ▲ 200.0% MoM growth on 300 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.