---
title: "Shark Costume Toddler — $6K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/shark-costume-toddler"
last_updated: "2026-08-10T13:30:35.769Z"
locale: en
meta:
description: "Niche score 41/100 · $6K/yr market · 69K searches/yr · $23.58 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $6K/yr market · 69K searches/yr · $23.58 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Shark Costume Toddler — $6K/yr Amazon US Niche (2026) - Flapen"
---
# **shark costume toddler**
**Skip it**
High returns (12.5%) — this niche doesn't clear our bar today.
Market size 2Growth 23Conversion 5Competition 81Returns 0Price range 82Avg price 95Brand share 76Review moat 68Quality gap 45
**Avg price**
**Incredible****$23.58**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.90–$35.45**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****34%**
top-5 click share — an open shelf
**Brand share**
**Great****59%**
top-5 brand share — no brand owns this niche
**Review moat**
**Good****791.03**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-4.0%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.4%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$6K**
$6K/yr · 69K searches
**Returns**
**Bad****12.5%**
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, shark costume toddler is a $6K/yr Amazon United States market (69K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 41/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **shark costume toddler market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$18K–$24K**
- units × avg price
- **Conversion rate**
- **0.4%**
- **Avg BSR**
- **#1,283**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **86%**
- **Out of stock**
- **11.8%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.
**Brands**
**19 **▲rising
**Sellers**
**42**
**Top-5 brand share**
**59%**
Top 20: 100%
**Top-5 click share**
**34%**
Top 20: 82%
**Open market**
**34%**
- HSCTEK18% - EraSpooky13% - Rubies10% - inkArts9% - LIOMENGZI8% - Coskidz7%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -4.0% search growth over the last 90 days.
10K6KSpike '24Holiday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 74.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/shark-costume-toddler/trend)
## **Top shark costume toddler search terms**
- **toddler shark costume**28K/yr+20.8%0.8% conv. - **shark costume toddler**23K/yr-26.6%0.8% conv. - **shark toddler costume**10K/yr-7.3%0.7% conv. - **toddler shark costume 2t**4K/yr+152.2%1.7% conv. - **toddler shark costume 3t**5K/yr-20.6%4.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/shark-costume-toddler/search-terms)
## **Top shark costume toddler 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%3%$1916%$3839%$57412%$7651101001K10K 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**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★138 rev](https://www.amazon.com/dp/B0F37VFKPL) [2**Shark Blanket Kids Shark Onesie for Kid Shark Costume Pajamas Kids Shark Blankets Hoodie Onesies**inkArts**$20.49**4.3★904 rev](https://www.amazon.com/dp/B0CLJ69TZC) [3**Coskidz Children Shark Costume Fish Grey Pink Yellow Blue Hoodie 3t 4t Boy Girl Halloween Birthday Party (S Gray)**Coskidz**$21.25**4.6★464 rev](https://www.amazon.com/dp/B07M7SFYHJ) [4**HSCTEK Shark Onesie Costume Kids Toddler Baby Pajamas Cosplay Blanket 4T**HSCTEK**$29.99**4.6★270 rev](https://www.amazon.com/dp/B0DB5BWX8R) [5**ALLAIBB Baby Infant Shark Costumes Outfit Cotton Romper Cute Jumpsuit Hooded Outwear for Toddler Baby Boys Girls 3-24M**ALLAIBB**$22.28**4.7★613 rev](https://www.amazon.com/dp/B07HHQHN53)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Spirit Halloween Toddler Shark Jumpsuit Costume Soft & Stylish Features an Attached Hood Zipper Closure Unisex Child Size 3T - 4T Standard Multicolor**Spirit Halloween**$29.74**5 rev1y ago](https://www.amazon.com/dp/B0FB3QMN17) [**Newleafly Unisex Kids Shark Onesie Pajamas Soft Cozy Animal Onesie Halloween Cosplay Costume**Newleafly**$24.64**15 rev1y ago](https://www.amazon.com/dp/B0F99J9VL3) [**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**138 rev1y ago](https://www.amazon.com/dp/B0F37VFKPL) [**BETTERFUN Baby Animal Hooded Romper Soft Infant Toddlers Christmas Outfits Winter Autumn Jumpsuit Shark 3-4T**BETTERFUN**$21.64**66 rev1y ago](https://www.amazon.com/dp/B0F1LM3VNJ) [**HSCTEK Shark Onesie Costume Kids Toddler Baby Pajamas Cosplay Blanket 4T**HSCTEK**$29.99**270 rev1y ago](https://www.amazon.com/dp/B0DB5BWX8R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**haikyuu Kid Shark Costume Grey Pink Yellow Blue Fish Hoodie Boy Girl Halloween Birthday Party Dress Up (pink Small)**haikyuu**$22.19**3.6★**▲ 1000%**](https://www.amazon.com/dp/B0G6FCJ932) [**haikyuu Kid Shark Costume Grey Pink Yellow Blue Fish Hoodie Boy Girl Halloween Birthday Party Dress Up (blue Small)**haikyuu**$21.60**3.6★**▲ 1000%**](https://www.amazon.com/dp/B0G6FFR4PM) [**HSCTEK Shark Onesie Costume Kids Baby Pajamas Cosplay Sleepwear Clothes 16**HSCTEK**$29.17**4.6★**▲ 1000%**](https://www.amazon.com/dp/B0DB1WDGQC) [**HSCTEK Shark Onesie Costume Kids Toddler Baby Pajamas Pjs Clothes 345T**HSCTEK**$31.67**4.6★**▲ 1000%**](https://www.amazon.com/dp/B0DB1V89FL) [**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★**▲ 1000%**](https://www.amazon.com/dp/B0F37VFKPL)
**~~View all trending →~~**
## **What buyers say about shark costume toddler**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**29%
*“Fit well”*
**Soft Feel**14%
*“It is very soft and comfortable”*
**Quality-Overall**9%
*“quality is great”*
**Comfort-Overall**9%
*“comfortable”*
**Gifting Purpose**7%
*“Best Xmas gift of the year”*
**Warmth**4%
*“Its warm”*
**Ease Of Use**2%
*“very easy to get on”*
**Fun/Entertainment Experience**2%
*“Its a very fun onesie”*
**Thickness**2%
*“Thickness is just right”*
**Durability**2%
*“holding up well”*
### **What buyers complain about **
**Size-Overall**29%
*“Way too small”*
**Gap/Hole**14%
*“I have bought this twice both times it has come with holes in it”*
**Durability**13%
*“it ripped 3 different times”*
**Quality-Overall**9%
*“Unfortunately, the overall construction feels extremely cheap”*
**Stitch/Finish/Polish**5%
*“The seams are all coming apart”*
**Thickness**4%
*“Its thin and cheap”*
**Allergies**4%
*“Itchy”*
**Zipper Quality**4%
*“Zipper broke on the first wash”*
**Advertised Vs Actual Product**2%
*“Product description was way off”*
**Touch/Button Controls**1%
*“The plastic button kept unsnapping”*
### **Top return reasons **
**Size-Overall**56%
**Length**15%
**Gap/Hole**6%
**Stitch/Finish/Polish**4%
**Material Quality**3%
**Advertised Vs Actual Product**2%
**Sleeve Fit**2%
**Arm Fit**1%
**Feet Fit**1%
**Durability**1%
## **Common questions**
- **Is shark costume toddler profitable to sell on Amazon United States?**
- The niche generates $6K/yr across 36 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.0%. Flapen's verdict: Skip it (41/100).
- **How competitive is the shark costume toddler niche?**
- 19 brands and 42 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 59% of demand.
- **What do buyers complain about in shark costume toddler?**
- Top complaints mined from reviews: Size-Overall, Gap/Hole, Durability. The return rate is 12.5% — above our launch gate.
- **When does demand for shark costume toddler peak?**
- Demand peaks in Sep–Oct; the busiest month runs 74.7× the quietest.
- **What does it cost to enter the shark costume toddler niche?**
- Listings span $10.90–$35.45; the average listing price is $23.58 (sweet spot $15–$100). The average incumbent carries 791 reviews — the moat a new listing must climb.
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