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

maamgic is the best-performing funny mens swim trunks brand in July 2026, moving 2,600 units across 3 ASINs for 34.2% of Top 10 volume. SILKWORLD follows with 1,000 units (13.2%), ahead of Yufawow on 1,000 units (13.2%).

With 8 brands splitting the Top 10 and 60.5% 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 $25.32, 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: B07FZRYH8P booked 1K units at $19.99. On the growth side, B0GQ4ZWP3C leads positive momentum with ▲ 150.0% MoM growth on 1K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.