---
title: "Runsie — $20K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/runsie"
last_updated: "2026-08-10T15:26:38.300Z"
locale: en
meta:
description: "Niche score 58/100 · $20K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 58/100 · $20K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Runsie — $20K/yr Amazon US Niche (2026) - Flapen"
---
# **runsie**
**Worth a look**
Shows a fragmented shelf (top 5 take 15% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 5Growth 89Conversion 4Competition 96Returns 2Price range 90Avg price 95Brand share 95Review moat 61Quality gap 67
**Competition**
**Incredible****15%**
top-5 click share — an open shelf
**Brand share**
**Incredible****39%**
top-5 brand share — no brand owns this niche
**Avg price**
**Incredible****$27.89**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.76–$88.58**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Great****+94.4%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****1,055.83**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$20K**
$20K/yr · 212K searches
**Conversion**
**Bad****0.3%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****11.6%**
return rate — above 5% kills the launch gate
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, runsie is a $20K/yr Amazon United States market (212K searches/yr). The top 5 brands hold 39% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 58/100.
Data updated Jul 13, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **runsie market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$21K–$28K**
- units × avg price
- **Conversion rate**
- **0.3%**
- **Avg BSR**
- **#473**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **87%**
- **Out of stock**
- **0.7%**
- **Avg brand age**
- **29 months**
- **Avg seller age**
- **156 days**
## **Competition & brand share**
Clicks spread well past the top 5 (15% combined) — an open shelf where new products get seen.
**Brands**
**54 **▲rising
**Sellers**
**74**
**Top-5 brand share**
**39%**
Top 20: 82%
**Top-5 click share**
**15%**
Top 20: 37%
**Open market**
**56%**
- CRZ YOGA10% - Caracilia8% - IUGA8% - YIOIOIO7% - ANRABESS6% - Beaully5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +94.4% search growth over the last 90 days.
10K6KPrime Day '24Holiday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 11.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/runsie/trend)
## **Top runsie search terms**
- **athletic one piece**20K/yr+55.6%0.2% conv. - **athletic romper with built in bra**11K/yr+229.2%0.3% conv. - **red athletic romper**13K/yr+262.8%0.4% conv. - **tennis romper**15K/yr+85.8%0.2% conv. - **workout romper with built in bra**13K/yr+129.7%0.3% conv. - **crz yoga romper**15K/yr+55.4%0.4% conv. - **romper workout**13K/yr+71.3%0.2% conv. - **plus size athletic romper**10K/yr+146.5%0.0% conv. - **work out romper**11K/yr+56.0%0.1% conv. - **activewear romper**10K/yr+93.6%0.2% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/runsie/search-terms)
## **Top runsie 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%1%$2012%$4033%$6044%$8061001K10K 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**IUGA Workout Romper Tummy Control Padded Athletic Romper with Shorts Running Onesie Jumpsuits Summer Outfits Set Gym Clothes**IUGA**$29.97**4.6★387 rev](https://www.amazon.com/dp/B0CR7BRJK2) [2**AUTOMET Womens Flattering Shaping Jumpsuit Romper for Summer 2026 Black M**AUTOMET**$20.25**4.3★2,835 rev](https://www.amazon.com/dp/B0BR8CKWVL) [3**Ekouaer Womens Summer Sleeveless Workout Rompers Athletic Jumpsuit Double Lined Shorts One Piece Gym Yoga Clothes Black**Ekouaer**$20.03**4.2★174 rev](https://www.amazon.com/dp/B0DWN48WK3) [4**Caracilia Womens Workout Athletic Romper Summer Sets Short Jumpsuits Onesie Running Outfits Exercise Gym 2025 Trendy Clothes Black M**Caracilia**$28.13**4.2★1,153 rev](https://www.amazon.com/dp/B0CFHJRB4Y) [5**IUGA Athletic Romper with Bra Soft Workout Romper for women Tummy Control Jumpsuits with Double Lined Summer Outfits Gym Sets**IUGA**$25.24**4.4★112 rev](https://www.amazon.com/dp/B0DP2H36BC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GTLIAE Summer Dress for Women 2026 Hot Shot Mini Romper Dresses Athletic Spaghetti Strap Tennis Dress Built in Shorts(Red-M)**GTLIAE**$21.15**1,017 rev6mo ago](https://www.amazon.com/dp/B0GCM85H35) [**VIUTIL Womens Athletic Dress Built in Shorts Hot Shot Mini Dress Spaghetti Straps Tennis Workout 2026 Summer Romper Dress Pink Small**VIUTIL**$21.27**607 rev1y ago](https://www.amazon.com/dp/B0F58QCNG3) [**Ekouaer Womens Summer Sleeveless Workout Rompers Athletic Jumpsuit Double Lined Shorts One Piece Gym Yoga Clothes Black**Ekouaer**$20.03**174 rev1y ago](https://www.amazon.com/dp/B0DWN48WK3) [**OFEEFAN Womens Athletic Dress Summer Clothes Tennis Golf Spring Bodycon Shorts Romper Backless Active Graduation Elegant Classy Black M**OFEEFAN**$19.21**1,675 rev1y ago](https://www.amazon.com/dp/B0F2S55CH1) [**QINSEN Women Rompers Sleeveless Square Neck Stretch Tummy Control Yoga Workout Jumpsuit Outfits Chestnut S**QINSEN**$32.52**553 rev1y ago](https://www.amazon.com/dp/B0DT75FQHD)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GTLIAE Summer Dress for Women 2026 Hot Shot Mini Romper Dresses Athletic Spaghetti Strap Tennis Dress Built in Shorts(Red-M)**GTLIAE**$21.15**4.3★**▲ 32%**](https://www.amazon.com/dp/B0GCM85H35) [**Ekouaer Womens Summer Sleeveless Workout Rompers Athletic Jumpsuit Double Lined Shorts One Piece Gym Yoga Clothes Black**Ekouaer**$20.03**4.2★**▲ 20%**](https://www.amazon.com/dp/B0DWN48WK3) [**ANRABESS Women Athletic Dress Summer Tennis Workout Active Sports Mini Romper Dress Built in Shorts Travel Vacation Clothes Black Large**ANRABESS**$21.65**4.3★**▲ 18%**](https://www.amazon.com/dp/B0C69C71GN) [**VIUTIL Womens Athletic Dress Built in Shorts Hot Shot Mini Dress Spaghetti Straps Tennis Workout 2026 Summer Romper Dress Pink Small**VIUTIL**$21.27**4.4★**▲ 17%**](https://www.amazon.com/dp/B0F58QCNG3) [**IUGA Athletic Romper with Bra Soft Workout Romper for women Tummy Control Jumpsuits with Double Lined Summer Outfits Gym Sets**IUGA**$25.24**4.4★**▲ 11%**](https://www.amazon.com/dp/B0DP2H36BC)
**~~View all trending →~~**
## **What buyers say about runsie**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**24%
*“fit as expected”*
**Comfort-Overall**18%
*“Comfortable to wear”*
**Quality-Overall**7%
*“GOOD QUALITY”*
**Color**6%
*“Nice color”*
**Material Quality**6%
*“Amazing material”*
**Shape/Style**5%
*“Super flattering”*
**Stretchability/Expandability/Elasticity**4%
*“stretch fabric”*
**Soft Feel**3%
*“The material is so soft”*
**Exercise/Sports Suitability**2%
*“Great for workout”*
**Value For Money**2%
*“Worth it”*
### **What buyers complain about **
**Size-Overall**23%
*“awkward fit”*
**Material Quality**5%
*“The material was extremely clingy”*
**Product Condition**3%
*“item was used”*
**Quality-Overall**3%
*“just not as good as what I expected”*
**Zipper Quality**2%
*“zipper kept breaking”*
**Strap/String Quality**2%
*“However, the straps annoy me sometimes”*
**Shape/Style**2%
*“Not flattering”*
**Chest Fit**2%
*“Not bigger bust friendly”*
**Comfort-Overall**2%
*“Very uncomfortable NECKLINE”*
**Stretchability/Expandability/Elasticity**2%
*“It doesnt have much stretch”*
### **Top return reasons **
**Size-Overall**51%
**Length**10%
**Chest Fit**8%
**Waist Fit**6%
**Material Quality**5%
**Shape/Style**3%
**Hip Fit**3%
**Advertised Vs Actual Product**2%
**Shoulder Fit**2%
**Color**1%
## **Common questions**
- **Is runsie profitable to sell on Amazon United States?**
- The niche generates $20K/yr across 175 tracked products. 5 of 41 products launched in the last 360 days are still selling. 90-day search growth is +94.4%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the runsie niche?**
- 54 brands and 74 sellers compete. The top 5 products take 15% of clicks and top 5 brands hold 39% of demand.
- **What do buyers complain about in runsie?**
- Top complaints mined from reviews: Size-Overall, Material Quality, Product Condition. The return rate is 11.6% — above our launch gate.
- **When does demand for runsie peak?**
- Demand peaks in May–Jun–Jul–Aug; the busiest month runs 11.7× the quietest.
- **What does it cost to enter the runsie niche?**
- Listings span $9.76–$88.58; the average listing price is $27.89 (sweet spot $15–$100). The average incumbent carries 1,056 reviews — the moat a new listing must climb.
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