---
title: "Girls Swimming Costume — £122K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/girls-swimming-costume"
last_updated: "2026-07-31T13:48:08.521Z"
locale: en
meta:
description: "Niche score 50/100 · £122K/yr market · 1.2M searches/yr · £11.76 avg price. Weak search conversion (0.9%) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · £122K/yr market · 1.2M searches/yr · £11.76 avg price. Weak search conversion (0.9%) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Girls Swimming Costume — £122K/yr Amazon UK Niche (2026) - Flapen"
---
# **girls swimming costume**
**Worth a look**
Shows a fragmented shelf (top 5 take 19% of clicks), but weak search conversion (0.9%) keeps it on the watch list.
Market size 28Growth 41Conversion 11Competition 95Returns 23Price range 51Avg price 48Brand share 77Review moat 72Quality gap 55
**Competition**
**Incredible****19%**
top-5 click share — an open shelf
**Brand share**
**Great****58%**
top-5 brand share — no brand owns this niche
**Review moat**
**Good****635.66**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Price range**
**Good****£5.71–£24.70**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Okay****£11.76**
avg listing price — sweet spot $15–$100
**Growth**
**Okay****+12.6%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****£122K**
£122K/yr · 1.2M searches
**Returns**
**Bad****5.5%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****0.9%**
search→purchase rate — share of searches ending in a sale
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%") [** High Returns**](https://flapen.com/research/niches?market=uk&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United Kingdom niche tracking, girls swimming costume is a £122K/yr Amazon United Kingdom market (1.2M searches/yr). The top 5 brands hold 58% of demand. Demand peaks in Jan. Verdict: Worth a look — 50/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **girls swimming costume market data**
- **Units sold / yr**
- **10K–13K**
- avg 100–250/product
- **Revenue / yr**
- **£118K–£147K**
- units × avg price
- **Conversion rate**
- **0.9%**
- **Avg BSR**
- **#60**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **93%**
- **Out of stock**
- **2.7%**
- **Avg brand age**
- **36 months**
- **Avg seller age**
- **177 days**
## **Competition & brand share**
Clicks spread well past the top 5 (19% combined) — an open shelf where new products get seen.
**Brands**
**33 **▲rising
**Sellers**
**75**
**Top-5 brand share**
**58%**
Top 20: 94%
**Top-5 click share**
**19%**
Top 20: 44%
**Open market**
**37%**
- Speedo19% - Ewbob13% - FishingDino12% - Amazon Essentials9% - InfiniZer5% - XiaoMoSha5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +12.6% search growth over the last 90 days.
40K30KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/uk/fashion/girls-swimming-costume/trend)
## **Top girls swimming costume search terms**
- **girls swimming costume**392K/yr+11.2%0.4% conv. - **swimming costume girls**279K/yr-1.1%0.5% conv. - **kids swimming costume**78K/yr+11.5%0.3% conv. - **girls swimsuit**52K/yr+59.5%0.2% conv. - **swimsuit girls**41K/yr+33.7%0.4% conv. - **speedo swimsuit girls**59K/yr-13.5%0.9% conv. - **swimming suit for girls**33K/yr+29.6%0.4% conv. - **girls swimming costumes one piece**24K/yr-16.0%0.7% conv. - **swim suit kids**20K/yr+101.2%0.1% conv. - **girls swimming costume age 12-13**21K/yr+110.2%1.2% conv. [**All search terms **](https://flapen.com/research/uk/fashion/girls-swimming-costume/search-terms)
## **Top girls swimming costume 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.
0%2%£2K4%£5K6%£7K8%£10K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Amazon Essentials Girls Quick-Dry Cross Back One-Piece Swimming Costume with 4-Way Stretch Blue Ditsy Floral 10 Years**Amazon Essentials**£12.77**4.2★78 rev](https://www.amazon.co.uk/dp/B0FJS4NR6G) [2**Ewbob Girls One Piece Swimsuit Quick Dry Swimwear Swimming Costume Beach Bathing Suit for Kids(C3-005)-Purple-9-10Y**Ewbob**£11.91**4.5★599 rev](https://www.amazon.co.uk/dp/B0DK359XJN) [3**Speedo Girls Endurance+ Medalist Swimsuit | Chlorine Resistance | Comfort Fit | SwiMing LeSons | Swim Holiday Black 11-1211-12**Speedo**£8.76**4.5★4,944 rev](https://www.amazon.co.uk/dp/B094DPX82Y) [4**Okdance Swimming Costume for Boys Girls One-Piece Kids Swimsuit Short Sleeve Swimming Costume for Summer Surfing Swimming Water Sports Boy Girl (UK Age 9 Years 11 Years Regular Pink)**Okdance**£9.20**4.2★95 rev](https://www.amazon.co.uk/dp/B0G6YB3C28) [5**Speedo Girls Endurance+ Legsuit Swimsuit | Chlorine Resistance | Comfort Fit | SwiMing LeSons | Swim Holiday Black 13-1413-14**Speedo**£15.38**4.6★379 rev](https://www.amazon.co.uk/dp/B0BLKT785R)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Amazon Essentials Girls Quick-Dry Cross Back One-Piece Swimming Costume with 4-Way Stretch Blue Ditsy Floral 10 Years**Amazon Essentials**£12.77**78 rev5mo ago](https://www.amazon.co.uk/dp/B0FJS4NR6G) [**Amazon Essentials Girls Quick-Dry Cross Back One-Piece Swimming Costume with 4-Way Stretch Pink Tomato Red Strawberries 3 Years**Amazon Essentials**£11.18**78 rev5mo ago](https://www.amazon.co.uk/dp/B0FJS77LNW) [**Okdance Swimming Costume for Boys Girls One-Piece Kids Swimsuit Short Sleeve Swimming Costume for Summer Surfing Swimming Water Sports Boy Girl (UK Age 9 Years 11 Years Regular Pink)**Okdance**£9.20**95 rev7mo ago](https://www.amazon.co.uk/dp/B0G6YB3C28) [**XiaoMoSha Swimming Costume Girls One Piece Bathing Suit with Adjustable Straps Color Contrast Trim for Teens Girls 13-14 Years Dark Blue**XiaoMoSha**£11.20**68 rev7mo ago](https://www.amazon.co.uk/dp/B0G5YFHQJL) [**XiaoMoSha Swimming Costume Girls One Piece Bathing Suit with Adjustable Straps Color Contrast Trim for Teens Girls 12-13 Years Black**XiaoMoSha**£12.79**68 rev7mo ago](https://www.amazon.co.uk/dp/B0G5YWY4XN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Amazon Essentials Girls Quick-Dry Cross Back One-Piece Swimming Costume with 4-Way Stretch Blue Ditsy Floral 10 Years**Amazon Essentials**£12.77**4.2★**▲ 46%**](https://www.amazon.co.uk/dp/B0FJS4NR6G) [**Girls Swimming Costume Padded Bras 7-15 Years Two Piece Drawstring Halterneck Girls Tankini Swimsuit with Boy Shorts Kids Bathing Suit Grey Blue Trees 11-12 Years**FishingDino**£13.99**4.5★**▲ 45%**](https://www.amazon.co.uk/dp/B0FZKH6CJM) [**Girls Swimming Costume Padded Bras 7-15 Years Two Piece Drawstring Halterneck Girls Tankini Swimsuit with Boy Shorts Kids Bathing Suit Black Trees 13-14 Years**FishingDino**£11.41**4.5★**▲ 41%**](https://www.amazon.co.uk/dp/B0FZKGYKCT) [**XiaoMoSha Swimming Costume Girls One Piece Bathing Suit with Adjustable Straps Color Contrast Trim for Teens Girls 12-13 Years Black**XiaoMoSha**£12.79**4.6★**▲ 40%**](https://www.amazon.co.uk/dp/B0G5YWY4XN) [**Amazon Essentials Girls Quick-Dry Cross Back One-Piece Swimming Costume with 4-Way Stretch Pink Tomato Red Strawberries 3 Years**Amazon Essentials**£11.18**4.2★**▲ 40%**](https://www.amazon.co.uk/dp/B0FJS77LNW)
**~~View all trending →~~**
## **What buyers say about girls swimming costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**30%
*“True to size”*
**Quality-Overall**20%
*“Good quality”*
**Comfort-Overall**9%
*“Very comfortable”*
**Color**5%
*“such lively vibrant colours”*
**Value For Money**4%
*“Good value for money”*
**Material Quality**4%
*“The material is comfortable and waterproof, as one would hope”*
**Exercise/Sports Suitability**4%
*“Perfect for swimming lessons, beach trips, pool days, and sports swimming”*
**Advertised Vs Actual Product**2%
*“True to picture”*
**Shape/Style**2%
*“Stylish”*
**Durability**2%
*“Durable”*
### **What buyers complain about **
**Size-Overall**34%
*“Too tight”*
**Durability**10%
*“Split open”*
**Value For Money**6%
*“This is something I would pay £2 for”*
**Material Quality**5%
*“The material is so cheap it is all wrinkle together and just awful”*
**Adhesion/Stickiness**4%
*“the hygiene label that was we pulled off left an awful sticky residue that I could not get off”*
**Zipper Quality**4%
*“Zip busted”*
**Transparency**4%
*“Almost see-through”*
**Advertised Vs Actual Product**3%
*“the picture doesnt do it justice”*
**Strap/String Quality**2%
*“my daughter thought it was a little low at the front even after adjusting the straps”*
**Stretchability/Expandability/Elasticity**2%
*“would stretch over time”*
### **Top return reasons **
**Size-Overall**82%
**Quality-Overall**3%
**Material Quality**2%
**Zipper Quality**1%
**Transparency**1%
**Length**1%
**Shape/Style**1%
**Color**1%
**Thin**1%
**Comfort-Overall**1%
## **Common questions**
- **Is girls swimming costume profitable to sell on Amazon United Kingdom?**
- The niche generates £122K/yr across 128 tracked products. 0 of 60 products launched in the last 360 days are still selling. 90-day search growth is +12.6%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the girls swimming costume niche?**
- 33 brands and 75 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 58% of demand.
- **What do buyers complain about in girls swimming costume?**
- Top complaints mined from reviews: Size-Overall, Durability, Value For Money. The return rate is 5.5% — above our launch gate.
- **When does demand for girls swimming costume peak?**
- Demand peaks in Jan; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the girls swimming costume niche?**
- Listings span £5.71–£24.70; the average listing price is £11.76 (sweet spot $15–$100). The average incumbent carries 636 reviews — the moat a new listing must climb.
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