Mens Funny Swim Trunks Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Srnede is the best-performing mens funny swim trunks brand in July 2026, moving 2,700 units across 2 ASINs for 30.0% of Top 10 volume. maamgic follows with 2,100 units (23.3%), ahead of Sixfish on 1,700 units (18.9%).

With 6 brands splitting the Top 10 and 72.2% 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 $11.04 to $26.91, 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: B09L5QC26W booked 700 units at $17.99, with ▲ 40.0% MoM change. On the growth side, B0D2QYZW3G leads positive momentum with ▲ 150.0% MoM growth 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.