---
title: "Baby Shark Costume — $49K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume"
last_updated: "2026-08-09T12:33:25.884Z"
locale: en
meta:
description: "Niche score 44/100 · $49K/yr market · 338K searches/yr · $22.08 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · $49K/yr market · 338K searches/yr · $22.08 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Baby Shark Costume — $49K/yr Amazon US Niche (2026) - Flapen"
---
# **baby shark costume**
**Skip it**
Weak search conversion (0.7%) — this niche doesn't clear our bar today.
Market size 12Growth 25Conversion 8Competition 89Returns 21Price range 77Avg price 93Brand share 77Review moat 63Quality gap 28
**Avg price**
**Great****$22.08**
avg listing price — sweet spot $15–$100
**Competition**
**Great****26%**
top-5 click share — an open shelf
**Brand share**
**Great****58%**
top-5 brand share — no brand owns this niche
**Price range**
**Great****$8.51–$36.72**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****998.04**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-0.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****6.2%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$49K**
$49K/yr · 338K searches
**Conversion**
**Bad****0.7%**
search→purchase rate — share of searches ending in a sale
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, baby shark costume is a $49K/yr Amazon United States market (338K searches/yr). The top 5 brands hold 58% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 44/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **baby shark costume market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$66K–$88K**
- units × avg price
- **Conversion rate**
- **0.7%**
- **Avg BSR**
- **#6,162**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **73%**
- **Out of stock**
- **8.2%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **177 days**
## **Competition & brand share**
Clicks spread well past the top 5 (26% combined) — an open shelf where new products get seen.
**Brands**
**30 **▲rising
**Sellers**
**49**
**Top-5 brand share**
**58%**
Top 20: 94%
**Top-5 click share**
**26%**
Top 20: 67%
**Open market**
**36%**
- HSCTEK26% - ALLAIBB10% - Markest8% - Rubies8% - Pinkfong6% - Generic6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -0.2% search growth over the last 90 days.
60K40KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 67.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume/trend)
## **Top baby shark costume search terms**
- **baby shark costume**187K/yr+0.5%0.6% conv. - **baby shark onesie**12K/yr-1.8%0.3% conv. - **baby shark halloween costume**15K/yr+216.6%0.2% conv. - **baby shark costume 3t**10K/yr+63.7%0.7% conv. - **baby shark costumes**6K/yr-10.6%0.9% conv. - **baby shark costume 2t**12K/yr+24.8%0.3% conv. - **baby shark costume toddler**52K/yr-67.5%1.8% conv. - **baby shark costume 4t**6K/yr-9.9%2.5% conv. - **toddler baby shark costume**10K/yr+3.7%1.5% conv. - **baby shark toddler costume**11K/yr-13.5%0.6% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/baby-shark-costume/search-terms)
## **Top baby shark 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%$9704%$2K6%$3K8%$4K101001K10K 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**Markest Onesie Unisex Adult Pajamas Animal Rose Red Shark Cosplay Costume Sleepwear L**Markest**$24.10**4.4★1,881 rev](https://www.amazon.com/dp/B07V7D654F) [2**Rubies Baby Shark: Baby Shark Costume with Sound Chip for Toddlers Unisex Toddler**Rubies**$24.50**4.5★5,047 rev](https://www.amazon.com/dp/B07NNSMRMN) [3**Shark Baby Costume Infant Animal Onesie Toddler Cosplay Boy Girl 69**HSCTEK**$22.92**4.7★702 rev](https://www.amazon.com/dp/B099NJDZS2) [4**ALLAIBB Baby Infant Shark Costumes Outfit Cotton Romper Cute Jumpsuit Hooded Outwear for Toddler Baby Boys Girls 3-24M**ALLAIBB**$20.87**4.7★613 rev](https://www.amazon.com/dp/B07HHRWMFJ) [5**Pinkfong Baby Shark Toddler Girls Glitter 2-Piece Knit Coverall and Headband Outfit Baby Shark Pink 3T**Pinkfong**$19.32**4.7★334 rev](https://www.amazon.com/dp/B09GZWFHT6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**XYJKIDSES Inflatable Shark Costume for Kids Funny Halloween Blow Up Costumes for Boys Girls Cosplay Party Suit (Blue Shark)**XYJKIDSES**$36.72**23 rev3mo ago](https://www.amazon.com/dp/B0GSJ6XNS1) [**3rd Birthday Baby Shark Shirt - 3 Year Old Outfit for Toddler Boy or Girl - Kids Party T-Shirt 4T Light Pink**Tstars**$17.37**664 rev8mo ago](https://www.amazon.com/dp/B0FXVCQ823) [**DILUFUN Baby Infant Boys Girls Shark Onesie Costume Toddler Halloween Cosplay Onesie Costume Funny Warm Dress Outfit 3-36months**DILUFUN**$19.29**192 rev1y ago](https://www.amazon.com/dp/B0FC2KW8TX) [**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Yellow)**Generic**$20.83**116 rev1y ago](https://www.amazon.com/dp/B0F5Q8SFGZ) [**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Rose Red)**Generic**$20.82**116 rev1y ago](https://www.amazon.com/dp/B0F5Q752BL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HSCTEK Shark Onesie Costume Kids Baby Pajamas Cosplay Sleepwear Clothes 16**HSCTEK**$29.17**4.6★**▲ 828%**](https://www.amazon.com/dp/B0DB1WDGQC) [**XYJKIDSES Inflatable Shark Costume for Kids Funny Halloween Blow Up Costumes for Boys Girls Cosplay Party Suit (Blue Shark)**XYJKIDSES**$36.72**4.9★**▲ 825%**](https://www.amazon.com/dp/B0GSJ6XNS1) [**3rd Birthday Baby Shark Shirt - 3 Year Old Outfit for Toddler Boy or Girl - Kids Party T-Shirt 4T Light Pink**Tstars**$17.37**4.8★**▲ 807%**](https://www.amazon.com/dp/B0FXVCQ823) [**LIOMENGZI Toddler Baby Boy Hooded Shark Summer Outfit Funny T-Shirt Shorts Set Infant Shark Clothes 6 12 18 Months 2T 3T(Blue Shark 12-18 Months)**LIOMENGZI**$13.24**4.6★**▲ 800%**](https://www.amazon.com/dp/B0F37VFKPL) [**inflatable costume adult Blow Up Shark Costume For Halloween Birthday Gift Role Playing Game Party Costumes (Rose Red)**Generic**$20.82**4.6★**▲ 800%**](https://www.amazon.com/dp/B0F5Q752BL)
**~~View all trending →~~**
## **What buyers say about baby shark costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Fun/Entertainment Experience**22%
*“Great fun”*
**Size-Overall**18%
*“Fit well”*
**Quality-Overall**13%
*“Great quality costume”*
**Comfort-Overall**6%
*“comfortable”*
**Durability**5%
*“dont break either”*
**Value For Money**3%
*“Great costume at a fantastic price”*
**Warmth**3%
*“warm amd thick baby love it”*
**Soft Feel**3%
*“The material is flexible. not stiff or scratchy.”*
**Thickness**3%
*“The shark is a patch that is nice and thick, and securely adhered”*
**Advertised Vs Actual Product**3%
*“Exactly as described”*
### **What buyers complain about **
**Size-Overall**31%
*“It was small”*
**Gap/Hole**11%
*“I have bought this twice both times it has come with holes in it”*
**Durability**9%
*“Falling apart”*
**Strap/String Quality**6%
*“the leg straps on the inside broke”*
**Quality-Overall**5%
*“Unfortunately, the overall construction feels extremely cheap”*
**Warmth**4%
*“Heads up, it gets very hot”*
**Thickness**3%
*“Its thin and cheap”*
**Zipper Quality**3%
*“Zipper broke on the first wash”*
**Smell**3%
*“All it did was make the entire load of laundry stink”*
**Hard Feel**3%
*“A bit hard”*
### **Top return reasons **
**Size-Overall**53%
**Length**15%
**Gap/Hole**5%
**Stitch/Finish/Polish**3%
**Advertised Vs Actual Product**3%
**Material Quality**3%
**Arm Fit**2%
**Sleeve Fit**2%
**Value For Money**2%
**Quality-Overall**1%
## **Common questions**
- **Is baby shark costume profitable to sell on Amazon United States?**
- The niche generates $49K/yr across 70 tracked products. 0 of 8 products launched in the last 360 days are still selling. 90-day search growth is -0.2%. Flapen's verdict: Skip it (44/100).
- **How competitive is the baby shark costume niche?**
- 30 brands and 49 sellers compete. The top 5 products take 26% of clicks and top 5 brands hold 58% of demand.
- **What do buyers complain about in baby shark costume?**
- Top complaints mined from reviews: Size-Overall, Gap/Hole, Durability. The return rate is 6.2% — above our launch gate.
- **When does demand for baby shark costume peak?**
- Demand peaks in Sep–Oct; the busiest month runs 67.3× the quietest.
- **What does it cost to enter the baby shark costume niche?**
- Listings span $8.51–$36.72; the average listing price is $22.08 (sweet spot $15–$100). The average incumbent carries 998 reviews — the moat a new listing must climb.
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