---
title: "Oneder the Sea Party Decorations Girl — $75K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/home-kitchen/oneder-the-sea-party-decorations-girl"
last_updated: "2026-08-10T15:14:04.618Z"
locale: en
meta:
description: "Niche score 54/100 · $75K/yr market · 162K searches/yr · $19.49 avg price. A small market ($75K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $75K/yr market · 162K searches/yr · $19.49 avg price. A small market ($75K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Oneder the Sea Party Decorations Girl — $75K/yr Amazon US Niche (2026) - Flapen"
---
# **oneder the sea party decorations girl**
**Worth a look**
Shows no brand lock-in (top 5 brands take 41% of clicks), but a small market ($75K/yr) keeps it on the watch list.
Market size 19Growth 64Conversion 30Competition 82Returns 38Price range 71Avg price 86Brand share 94Review moat 72Quality gap 22
**Brand share**
**Great****41%**
top-5 brand share — no brand owns this niche
**Avg price**
**Great****$19.49**
avg listing price — sweet spot $15–$100
**Competition**
**Great****33%**
top-5 click share — an open shelf
**Review moat**
**Good****620.68**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****$6.87–$35.06**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+42.8%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****4.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.4%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$75K**
$75K/yr · 162K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, oneder the sea party decorations girl is a $75K/yr Amazon United States market (162K searches/yr). The top 5 brands hold 41% of demand. Demand peaks in Jun–Jul. Verdict: Worth a look — 54/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **oneder the sea party decorations girl market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **$49K–$58K**
- units × avg price
- **Conversion rate**
- **2.4%**
- **Avg BSR**
- **#3,168**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **4.6%**
- **Avg brand age**
- **26 months**
- **Avg seller age**
- **189 days**
## **Competition & brand share**
Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.
**Brands**
**40 **▼falling
**Sellers**
**48**
**Top-5 brand share**
**41%**
Top 20: 84%
**Top-5 click share**
**33%**
Top 20: 75%
**Open market**
**54%**
- Fiesec11% - TITKKOP9% - Bezkega8% - Fexivo8% - Afniimyapt6% - Panouo5%
## **Demand & seasonality**
Weekly Amazon search volume, last 56 weeks — +42.8% search growth over the last 90 days.
6K4KPrime Day '25Spike '26 seasonJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jun, Jul · busiest ÷ quietest = 3.5×
[**Open Trend **](https://flapen.com/research/us/home-kitchen/oneder-the-sea-party-decorations-girl/trend)
## **Top oneder the sea party decorations girl search terms**
- **oneder the sea party decorations girl**78K/yr+28.7%1.2% conv. - **oneder the sea**30K/yr+58.1%0.9% conv. - **oneder the sea party decorations**16K/yr+64.0%1.1% conv. - **order the sea 1st birthday girl**12K/yr+87.9%0.7% conv. - **oneder the sea 1st birthday girl**12K/yr+86.7%0.8% conv. - **mermaid 1st birthday decorations**6K/yr+48.5%1.0% conv. - **one der the sea birthday**7K/yr-17.1%0.7% conv. [**All search terms **](https://flapen.com/research/us/home-kitchen/oneder-the-sea-party-decorations-girl/search-terms)
## **Top oneder the sea party decorations girl 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%$1K4%$3K6%$4K8%$6K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Oneder The Sea Party Decorations Girl 274psc Order The Sea 1st Birthday Girl Plates and Napkins Cups Banner Backdrop Tablecloth Cake Topper Balloon for One Der The Sea Birthday Supplies**Bezkega**$28.40**4.5★148 rev](https://www.amazon.com/dp/B0GWTH535F) [2**Fexivo 258 PCS Oneder The Sea Party Decorations Girl Hassle-Free One-stop Set for 25 Guests with Balloon Banner Backdrop Plates and Napkins Easy Setup for Girls First Birthday**Fexivo**$30.37**4.7★24 rev](https://www.amazon.com/dp/B0FY2SL66H) [3**Fiesec Under The Sea 1 Year Old Party Decoration Ocean Animal First Birthday Party Decorations 1st Birthday Decorations for Girl Backdrop Banner Balloon Cake Topper Crown Box Cutouts**Fiesec**$30.81**4.8★43 rev](https://www.amazon.com/dp/B0DDBT85WF) [4**TITKKOP Baby Girl 1st Birthday Clothes One Year Old Tulle Romper Sleeveless Bodysuit Cake Smash Outfits(mermaid 9-12M)**TITKKOP**$15.92**4.8★2,461 rev](https://www.amazon.com/dp/B0F1F821YY) [5**Oneder the Sea Photo Board Ocean Animal 1st Birthday Party Wooden Board Decorations 12 Monthly Milestone Picture Frame One Year Old Wood Sign Banner for Baby Keepsake Gift Supply(Fit 2x2.8 inch Photo)**Afniimyapt**$14.19**5.0★2 rev](https://www.amazon.com/dp/B0GL8DHL7X)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Oneder the Sea Party Decorations Girls Under the Sea 1st Birthday Party Decorations Ocean Animal Mermaid First Birthday Supplies All-in-One Party Kit Party Balloon for 1st Birthday Decorations Girl**Kudapity**$32.57**0 rev1mo ago](https://www.amazon.com/dp/B0GYX3Z8HR) [**Oneder The Sea Party Decorations Girl 274psc Order The Sea 1st Birthday Girl Plates and Napkins Cups Banner Backdrop Tablecloth Cake Topper Balloon for One Der The Sea Birthday Supplies**Bezkega**$28.40**148 rev3mo ago](https://www.amazon.com/dp/B0GWTH535F) [**272Pcs Oneder the Sea Party Decorations Ocean Themed Party Decorations with Monthly Photo Banner Backdrop Plates Napkins Tablecloth Balloon Box Cake Topper for Boys Girls 1st Birthday Party**Pymurod**$29.21**9 rev3mo ago](https://www.amazon.com/dp/B0GVY57SQN) [**My Mermaid First Year Photo Board Oneder The Sea Birthday Decoration Photo Frame 12 Monthly Baby Milestone Sign Ocean Nursery Decor for Girl Boy Gender Neutral Baby Keepsake Gifts-A18**Dualmins**$15.97**1 rev4mo ago](https://www.amazon.com/dp/B0GQGYFYXZ) [**Oneder the Sea Photo Board Ocean Animal 1st Birthday Party Wooden Board Decorations 12 Monthly Milestone Picture Frame One Year Old Wood Sign Banner for Baby Keepsake Gift Supply(Fit 2x2.8 inch Photo)**Afniimyapt**$14.19**2 rev5mo ago](https://www.amazon.com/dp/B0GL8DHL7X)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Oneder the Sea Party Decorations Girls Under the Sea 1st Birthday Party Decorations Ocean Animal Mermaid First Birthday Supplies All-in-One Party Kit Party Balloon for 1st Birthday Decorations Girl**Kudapity**$32.57**0.0★**▲ 165%**](https://www.amazon.com/dp/B0GYX3Z8HR) [**My Mermaid First Year Photo Board Oneder The Sea Birthday Decoration Photo Frame 12 Monthly Baby Milestone Sign Ocean Nursery Decor for Girl Boy Gender Neutral Baby Keepsake Gifts-A18**Dualmins**$15.97**5.0★**▲ 165%**](https://www.amazon.com/dp/B0GQGYFYXZ) [**Oneder The Sea Party Decorations Girl 274psc Order The Sea 1st Birthday Girl Plates and Napkins Cups Banner Backdrop Tablecloth Cake Topper Balloon for One Der The Sea Birthday Supplies**Bezkega**$28.40**4.5★**▲ 163%**](https://www.amazon.com/dp/B0GWTH535F) [**272Pcs Oneder the Sea Party Decorations Ocean Themed Party Decorations with Monthly Photo Banner Backdrop Plates Napkins Tablecloth Balloon Box Cake Topper for Boys Girls 1st Birthday Party**Pymurod**$29.21**4.5★**▲ 162%**](https://www.amazon.com/dp/B0GVY57SQN) [**Oneder The Sea for Backdrop Wooden Under The Sea 1 Year Old Party Decoration for Under the Sea Party Decorations Ocean Theme Birthday Party Supplies**QWTOWFM**$9.59**4.8★**▲ 122%**](https://www.amazon.com/dp/B0FX997S6N)
**~~View all trending →~~**
## **What buyers say about oneder the sea party decorations girl**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Color**15%
*“Color is accurate”*
**Quality-Overall**15%
*“Great quality and enough room”*
**Assembly/Installation**11%
*“Easy set up”*
**Value For Money**7%
*“Worth every penny”*
**Durability**7%
*“Beautiful and durable”*
**Design-Overall**6%
*“Great quality and lots of fun designs”*
**Advertised Vs Actual Product**5%
*“Looks like the picture”*
**Size-Overall**5%
*“Great size”*
**Ease Of Use**4%
*“Easy to use”*
**Brightness/Shine/Glow**4%
*“So cute and bright”*
### **What buyers complain about **
**Size-Overall**12%
*“The plates are a little smaller than expected”*
**Quality-Overall**12%
*“Varying Levels of Quality”*
**Advertised Vs Actual Product**8%
*“False Advertisement”*
**Inflation/Deflation**7%
*“when inflated immediately started disenflating”*
**Color**5%
*“Colors dull, not as shown”*
**Durability**5%
*“tore off very easily”*
**Ease Of Use**3%
*“A little frustrating”*
**Adhesion/Stickiness**3%
*“Adhesive impossible to get off”*
**Smell**3%
*“There was a slight smell to them so please be aware”*
**Value For Money**2%
*“Looks expensive”*
### **Top return reasons **
**Size-Overall**24%
**Advertised Vs Actual Product**14%
**Color**13%
**Value For Money**11%
**Quality-Overall**6%
**Inflation/Deflation**4%
**Material Quality**4%
**Defective Material/Parts**4%
**Functionality-Overall**3%
**Product Condition**2%
## **Common questions**
- **Is oneder the sea party decorations girl profitable to sell on Amazon United States?**
- The niche generates $75K/yr across 50 tracked products. 2 of 13 products launched in the last 360 days are still selling. 90-day search growth is +42.8%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the oneder the sea party decorations girl niche?**
- 40 brands and 48 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 41% of demand.
- **What do buyers complain about in oneder the sea party decorations girl?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 4.0%.
- **When does demand for oneder the sea party decorations girl peak?**
- Demand peaks in Jun–Jul; the busiest month runs 3.5× the quietest.
- **What does it cost to enter the oneder the sea party decorations girl niche?**
- Listings span $6.87–$35.06; the average listing price is $19.49 (sweet spot $15–$100). The average incumbent carries 621 reviews — the moat a new listing must climb.
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