Mens Swim Trunks 9 Inch Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Mens Swim Trunks 9 Inch sales on Amazon US totaled 28,150 units in July 2026 (▼ 13.3% vs. the prior month), generating an estimated $586,792 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 60.4% of unit volume and 60.0% of revenue, while a typical listing is priced at $17.30. The keyword itself pulled 7,389 Amazon queries over the same period (▼ 59.3% MoM).
Zooming out to the 12-month window ending July 2026, the mens swim trunks 9 inch Top 50 moved 139,850 units and $2,927,604 in cumulative sales — an average of 11,654 units and $243,967 per month. Monthly throughput topped out at 32,450 units in June 2026 and dipped to 5,200 in October 2025, leaving the latest reading 123.4% higher than August 2025.
Mens Swim Trunks 9 Inch Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
28.1K
▼ 13.3% MoM
Monthly Revenue 2026/07
$586.8K
▼ 15.5% MoM
Top 10 Market Share 2026/07
60.4%
Mens Swim Trunks 9 Inch Market Share & Sales Concentration on Amazon US — July 2026
The most-sold mens swim trunks 9 inch listing on Amazon US in July 2026 is ASIN B09M6P81L9 (Brand: ELETOP), which sold 3,000 units at $17.99 apiece — equal to 10.7% of every unit tracked in this report.
The Top 10 ASINs account for 17,000 units and $352,020 in July 2026 — 60.4% of unit volume and 60.0% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Mens Swim Trunks 9 Inch' on Amazon
July 2026
Is 60.4% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B09M6P81L9
ELETOP Men's Swim Trunks with Mesh Liner 9 Inch Beach Bathing Suit
3K
▲ 0.0%vs. prior month
$58.1K
latest month
12-month trend
B085C2KTNG
FT FENTENG Mens Swim Trunks Quick Dry Board Shorts with Mesh Liner, Breathable Big & Tall Beach Shorts Swimwear Bathing Suits
3K
▲ 0.0%vs. prior month
$59.9K
latest month
12-month trend
B0967MZ6J9
Srnede Mens Swimming Trunks Swim Trunks Quick Dry Swim Shorts with Mesh Lining Funny Swimwear Bathing Suits
2K
▼ 33.3%vs. prior month
$25.1K
latest month
12-month trend
B0BLNQ3C8Y
maamgic Mens Swim Trunks with Compression Liner 5 Inch Quick Dry for Beach
2K
▲ 0.0%vs. prior month
$54.8K
latest month
12-month trend
B085C27GG1
FT FENTENG Mens Swim Trunks Quick Dry Board Shorts with Mesh Liner, Breathable Big & Tall Beach Shorts Swimwear Bathing Suits
2K
▲ 0.0%vs. prior month
$40K
latest month
12-month trend
B0BLN6NFBY
maamgic 2 in 1 Mens Swim Trunks 7 Inch Swim Shorts Swim Suits Board Shorts
1K
▼ 66.7%vs. prior month
$32.2K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Mens Swim Trunks 9 Inch Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
FT FENTENG is the best-performing mens swim trunks 9 inch brand in July 2026, moving 5,000 units across 2 ASINs for 29.4% of Top 10 volume. ELETOP follows with 3,000 units (17.6%), ahead of maamgic on 3,000 units (17.6%).
With 7 brands splitting the Top 10 and 64.7% 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 $17.99 to $29.04, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
FT FENTENG
2 ASINs in Top 10
29.4%
Units
5K
Revenue
$99.9K
Avg. price
$19.99
B085C2KTNG
$19.99·★4.5·6.7K revsFT FENTENG Mens Swim Trunks Quick Dry Board Shorts with Mesh Liner, Breathable Big & Tall Beach Shorts Swimwear Bathing Suits
Units sold3KB085C27GG1
$19.99·★4.5·6.7K revsFT FENTENG Mens Swim Trunks Quick Dry Board Shorts with Mesh Liner, Breathable Big & Tall Beach Shorts Swimwear Bathing Suits
Units sold2K
ELETOP
1 ASIN in Top 10
17.6%
Units
3K
Revenue
$58.1K
Avg. price
$17.99
B09M6P81L9
$17.99·★4.6·4.5K revsELETOP Men's Swim Trunks with Mesh Liner 9 Inch Beach Bathing Suit
Units sold3K
maamgic
2 ASINs in Top 10
17.6%
Units
3K
Revenue
$87K
Avg. price
$29.04
B0BLNQ3C8Y
$28.39·★4.6·5.3K revsmaamgic Mens Swim Trunks with Compression Liner 5 Inch Quick Dry for Beach
Units sold2KB0BLN6NFBY
$29.69·★4.6·4.9K revsmaamgic 2 in 1 Mens Swim Trunks 7 Inch Swim Shorts Swim Suits Board Shorts
Units sold1K
Trending Mens Swim Trunks 9 Inch Products — Growth Leaders & New Top 10 Entrants
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: B0GCBFB1TM booked 1K units at $14.99, with ▲ 25.0% MoM change. On the growth side, B0GC8WD89K leads positive momentum with ▲ 150.0% MoM growth on 500 units, with B0CQNQ2D93 close behind at ▲ 100.0% MoM on 400 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.
B0GCBFB1TM
STICKON Mens Swim Trunks with Zip Pockets Beach Board Shorts Bathing Suit
Price
$14.99
Rating
4.3
Reviews
147
Latest month sales
B0GC8WD89K
STICKON Mens Swim Trunks with Zip Pockets Beach Board Shorts Bathing Suit
Price
$19.99
Rating
4.3
Reviews
149
Latest month sales
B0CQNQ2D93
SILKWORLD Mens Swim Trunks Quick Dry 9" Bathing Suit Beach Swimming Shorts
Unlock to view ASIN details and product titles
Price
$24.99
Rating
4.6
Reviews
573
Latest month sales
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