Is 3t swim trunks profitable to sell on Amazon United States?

The niche generates $94K/yr across 231 tracked products. 15 of 67 products launched in the last 360 days are still selling. 90-day search growth is +35.9%. Flapen's verdict: Worth a look (56/100).

How competitive is the 3t swim trunks niche?

60 brands and 61 sellers compete. The top 5 products take 12% of clicks and top 5 brands hold 41% of demand.

What do buyers complain about in 3t swim trunks?

Top complaints mined from reviews: Size-Overall, Thickness, Quality-Overall. The return rate is 3.4%.

When does demand for 3t swim trunks peak?

Demand peaks in Mar–Apr–Jun–Jul; the busiest month runs 7.4× the quietest.

What does it cost to enter the 3t swim trunks niche?

Listings span $5.89–$33.63; the average listing price is $16.12 (sweet spot $15–$100). The average incumbent carries 2,478 reviews — the moat a new listing must climb.

3t swim trunks

Worth a look

Shows a fragmented shelf (top 5 take 12% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Competition

Incredible12%

top-5 click share — an open shelf

Brand share

Great41%

top-5 brand share — no brand owns this niche

Avg price

Great$16.12

avg listing price — sweet spot $15–$100

Price range

Good$5.89–$33.63

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Good+35.9%

90-day search growth — must beat 0% to launch

Returns

Okay3.4%

return rate — above 5% kills the launch gate

Review moat

Okay2,477.92

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay2.5%

search→purchase rate — share of searches ending in a sale

Market size

Bad$94K

$94K/yr · 230K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, 3t swim trunks is a $94K/yr Amazon United States market (230K searches/yr). The top 5 brands hold 41% of demand. Demand peaks in Mar–Apr–Jun–Jul. Verdict: Worth a look — 56/100.

Data updated Jul 8, 2026 · scored weekly · How we score niches

3t swim trunks market data

Units sold / yr: 5K–6K; avg 0–100/product
Revenue / yr: $81K–$97K; units × avg price
Conversion rate: 2.5%
Avg BSR: #65
Page quality: 0%
Prime: 100%
Sponsored: 93%
Out of stock: 1.8%
Avg brand age: 31 months
Avg seller age: 153 days

Competition & brand share

Clicks spread well past the top 5 (12% combined) — an open shelf where new products get seen.

Brands

60 rising

Sellers

Top-5 brand share

41%

Top 20: 77%

Top-5 click share

12%

Top 20: 29%

Open market

56%

maamgic21%
AlisOker5%
BliBliTaTa5%
AMIYAN5%
UMELOK4%
Marvel4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +35.9% search growth over the last 90 days.

Peak months: Mar, Apr, Jun, Jul · busiest ÷ quietest = 7.4×

Open Trend

Top 3t swim trunks search terms

4t swim trunks25K/yr +47.5%1.8% conv.
5t swim trunks24K/yr +42.9%2.1% conv.
3t swim trunks21K/yr +32.7%1.9% conv.
2t swim trunks19K/yr +41.4%1.8% conv.
boys swim trunks 5t13K/yr +10.8%2.5% conv.
boys 5t swim trunks10K/yr +32.9%2.8% conv.
3t boys swim trunks9K/yr +31.4%2.1% conv.
18 month swim trunks9K/yr +34.5%0.8% conv.
5t boys swim trunks10K/yr +18.6%1.9% conv.
baby swim shorts8K/yr +74.6%0.1% conv.

All search terms

Top 3t swim trunks products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

AMIYAN Boys Swim Trunks Toddler Swim Board Shorts Quick Dry Beach Swimwear Trunks Shorts Bathing Bottom for Boy Black Dinosuar XL 4-5T

AMIYAN$9.164.4★358 rev

UMELOK Boys Swim Trunks Swimsuit Boxer Brief 2 in 1 Compression Liner Stretch Swim Shorts Quick Dry Beach Bathing Suit Neon Pineapple 5/6

UMELOK$9.804.7★573 rev

AMIYAN Boys Swim Trunks Toddler Swim Board Shorts Quick Dry Beach Swimwear Trunks Shorts Bathing Bottom for Boy Black Dinosuar M 2-3T

AMIYAN$9.084.4★358 rev

maamgic Boys Swim Trunks with Compression Liner Toddler Stretch Swim Shorts Quick Dry Swimming Trunks Boxer Brief 2 in 1 Beach Shorts Rose Coconut 5/6

maamgic$24.814.8★2,162 rev

maamgic Boys Swim Trunks Toddler Swim Shorts Little Boys Bathing Suit Swimsuit Toddler Boy Swimwear Stripe Redwhite 5 T

maamgic$19.434.8★10,972 rev

Newest

by launch date

Simple Joys by Carters Toddler Boys 2-piece Swimsuit Trunk and Rashguard Orange Blue Ship 5T

Simple Joys by Carter's$18.7245,021 rev

2mo ago

BliBliTaTa Boys Swim Trunks Quick Dry with Stretch Compression Liner Beach Shorts for Toddler Swimwear 2T 3T 4T 5 6 7 8 10 12 14 16 Years Killer whale-10/12

BliBliTaTa$8.2693 rev

6mo ago

Pottwal Boys Swim Trunks for 2-16 Years UPF 50+ Chlorine Resistant Water Repellent Adjustable Waistband

Pottwal$10.6249 rev

7mo ago

Disney Marvel Spiderman Little Boys Rash Guard Swim Trunks Compression Summer Swim Shorts Kids Swimsuit Black Swimwear UPF 50+Swimming Trunk Surf Bathing Suit Pool Party Playwear Board Short 4-5 Years

Disney$15.14129 rev

7mo ago

UMELOK Boys Swim Trunks Swimsuit Boxer Brief 2 in 1 Compression Liner Stretch Swim Shorts Quick Dry Beach Bathing Suit Neon Pineapple 5/6

UMELOK$9.80573 rev

11mo ago

What buyers say about 3t swim trunks

What buyers praise and complain about, mined from review topics.

What buyers love

Size-Overall32%

“Fit as expected”

Color12%

“Vibrant colors”

Quality-Overall11%

“Good Quality and came in 1 day”

Value For Money6%

“Worth the Money”

Comfort-Overall6%

“Super comfortable”

Material Quality4%

“Nice material for swimming”

Quick Drying3%

“Dries very quickly”

Advertised Vs Actual Product3%

“Better than expected”

Lining Quality3%

“Love the inner lining and bright colors”

Exercise/Sports Suitability2%

“Brightly colored perfect fun swim pants for boys”

What buyers complain about

Size-Overall33%

“Run Large”

Thickness10%

“somewhat thin”

Quality-Overall6%

“Like not the best quality”

Material Quality6%

“These were jot the material I was expecting”

Defective Material/Parts4%

“Damaged item”

Waist Fit4%

“Crotch to waist is short”

Color4%

“Green completely faded to grey after 1 wear”

Shape/Style1%

“wish there were even more style options”

Strap/String Quality1%

“Lo único que una de las tiras vino un poco deshilachada”

Top return reasons

Size-Overall66%

Length9%

Waist Fit9%

Hip Fit3%

Material Quality2%

Color2%

Advertised Vs Actual Product2%

Value For Money1%

Thin1%

Quality-Overall1%

Common questions

Is 3t swim trunks profitable to sell on Amazon United States?: The niche generates $94K/yr across 231 tracked products. 15 of 67 products launched in the last 360 days are still selling. 90-day search growth is +35.9%. Flapen's verdict: Worth a look (56/100).
How competitive is the 3t swim trunks niche?: 60 brands and 61 sellers compete. The top 5 products take 12% of clicks and top 5 brands hold 41% of demand.
What do buyers complain about in 3t swim trunks?: Top complaints mined from reviews: Size-Overall, Thickness, Quality-Overall. The return rate is 3.4%.
When does demand for 3t swim trunks peak?: Demand peaks in Mar–Apr–Jun–Jul; the busiest month runs 7.4× the quietest.
What does it cost to enter the 3t swim trunks niche?: Listings span $5.89–$33.63; the average listing price is $16.12 (sweet spot $15–$100). The average incumbent carries 2,478 reviews — the moat a new listing must climb.