---
title: "Styrofoam Balls 4 Inch — $37K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/arts-crafts-sewing/styrofoam-balls-4-inch"
last_updated: "2026-08-09T12:52:24.300Z"
locale: en
meta:
description: "Niche score 38/100 · $37K/yr market · 29K searches/yr · $15.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $37K/yr market · 29K searches/yr · $15.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Styrofoam Balls 4 Inch — $37K/yr Amazon US Niche (2026) - Flapen"
---
# **styrofoam balls 4 inch**
**Skip it**
A small market ($37K/yr) — this niche doesn't clear our bar today.
Market size 9Growth 12Conversion 80Competition 34Returns 40Price range 61Avg price 76Brand share 40Review moat 75Quality gap 35
**Conversion**
**Great****8.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$15.22**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****498.9**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****$6.68–$28.22**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Returns**
**Okay****3.8%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****64%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-26.4%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$37K**
$37K/yr · 29K searches
According to Flapen's Amazon United States niche tracking, styrofoam balls 4 inch is a $37K/yr Amazon United States market (29K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 38/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **styrofoam balls 4 inch market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$46K–$61K**
- units × avg price
- **Conversion rate**
- **8.3%**
- **Avg BSR**
- **#164**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **4.2%**
- **Avg brand age**
- **54 months**
- **Avg seller age**
- **193 days**
## **Competition & brand share**
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▼falling
**Sellers**
**20**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**64%**
Top 20: 100%
**Open market**
**14%**
- Crafare26% - Crafjie17% - Evershine16% - Champion Sports16% - AHKUNMT6% - Meuey Lyot5% - Open — no brand owns it (8 brands, 14%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -26.4% search growth over the last 90 days.
1K800Spike '24Black Friday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov · busiest ÷ quietest = 2.6×
[**Open Trend **](https://flapen.com/research/us/arts-crafts-sewing/styrofoam-balls-4-inch/trend)
## **Top styrofoam balls 4 inch search terms**
- **styrofoam balls 4 inch**11K/yr-26.5%10.0% conv. - **4 inch foam balls**6K/yr-21.7%6.5% conv. - **4 inch styrofoam balls**6K/yr-27.7%14.5% conv. - **4in styrofoam balls**3K/yr-16.0%11.0% conv. - **4 styrofoam balls**4K/yr-41.4%15.2% conv. [**All search terms **](https://flapen.com/research/us/arts-crafts-sewing/styrofoam-balls-4-inch/search-terms)
## **Top styrofoam balls 4 inch 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%5%$2K10%$4K15%$6K20%$7K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Champion Sports Coated High Density Foam Ball 4 Inch Red**Champion Sports**$7.52**4.3★695 rev](https://www.amazon.com/dp/B000KYQ406) [2**Evershine 24 Pack 4 Inch Craft Foam Ball - White Smooth Craft Foam Polystyrene Balls for DIY Craft and Art School Project**Evershine**$28.22**4.6★1,054 rev](https://www.amazon.com/dp/B0CM7F44S6) [3**Crafjie 4 Inch Craft Foam Balls 24-Pack Supplies Foam Balls for Christmas DIY Arts and Crafts Smooth Polystyrene Foam Ball for Decoration Household School Projects White**Crafjie**$25.25**4.7★566 rev](https://www.amazon.com/dp/B085G66D7B) [4**Crafare 4 Inch 4 Pack Foam Balls for Crafts White Polystyrene Smooth Craft Foam Balls for DIY Household School Projects Party Decoration**Crafare**$9.85**4.6★851 rev](https://www.amazon.com/dp/B0C6216FCV) [5**Crafare 4 Inch 2 Pack Foam Balls for Crafts White Polystyrene Round Foam Balls for Art Household DIY School Projects Party Ornaments Decoration**Crafare**$7.93**4.6★851 rev](https://www.amazon.com/dp/B0C61YV3HN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**2 Pack White Polystyrene Craft Balls 4 Inch Foam Balls for Crafts Smooth Round Ornament Ball for Easter Art Craft Household School Projects Christmas Party Decorations Weddings Gathering**Gsbnjuy**$7.60**0 rev3mo ago](https://www.amazon.com/dp/B0GSYGLYFP) [**Meuey Lyot 4 inch About 10.2 cm White Styrofoam Ball Foam Balls Craft Ball Foam Balls DIY Art Deco and Home Craft Project 6PCS**Meuey Lyot**$11.75**25 rev1y ago](https://www.amazon.com/dp/B0F4X16GP5) [**Lyellfe 24 Pack Craft Foam Balls 4 Inch Round Polystyrene Crafts Balls for DIY Projects Christmas Ornaments School Modeling Drawing**Lyellfe**$23.47**14 rev1y ago](https://www.amazon.com/dp/B0DL5P44NV) [**Styrofoam Balls 4 Inch 12PC Large White Foam Balls for Crafts DIY Craft Giant Foam Ball for Home and School Smooth Solid Round (Styrofoam-4in-12pc)**AHKUNMT**$17.10**415 rev1y ago](https://www.amazon.com/dp/B0DKJ75LL3) [**Styrofoam Half Balls 4 Inch 8PC Large White Half Foam Balls for Crafts DIY Craft Giant Foam Balls for Home and School Smooth Solid Round Balls (Half styrofoam-4in-8pc)**AHKUNMT**$11.61**408 rev2y ago](https://www.amazon.com/dp/B0CSFB39BH)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Evershine 24 Pack 4 Inch Craft Foam Ball - White Smooth Craft Foam Polystyrene Balls for DIY Craft and Art School Project**Evershine**$28.22**4.6★**▲ 264%**](https://www.amazon.com/dp/B0CM7F44S6) [**2 Pack White Polystyrene Craft Balls 4 Inch Foam Balls for Crafts Smooth Round Ornament Ball for Easter Art Craft Household School Projects Christmas Party Decorations Weddings Gathering**Gsbnjuy**$7.60**0.0★**▲ 264%**](https://www.amazon.com/dp/B0GSYGLYFP) [**Champion Sports Coated High Density Foam Ball 4 Inch Red**Champion Sports**$7.52**4.3★**▲ 122%**](https://www.amazon.com/dp/B000KYQ406) [**TFARC FOAM 4 Pack Foam Balls for Crafts 4.5-Inch Round White Polystyrene Spheres for DIY Projects Ornaments Classroom Festivals Decoration**TFARC FOAM**$12.79**4.6★**▲ 67%**](https://www.amazon.com/dp/B0CJNG6DSW) [**Meuey Lyot 4 inch About 10.2 cm White Styrofoam Ball Foam Balls Craft Ball Foam Balls DIY Art Deco and Home Craft Project 6PCS**Meuey Lyot**$11.75**4.2★**▲ 47%**](https://www.amazon.com/dp/B0F4X16GP5)
**~~View all trending →~~**
## **What buyers say about styrofoam balls 4 inch**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Fun/Entertainment Experience**17%
*“Great Fun”*
**Value For Money**13%
*“Great Value”*
**Quality-Overall**10%
*“Quality is great as well”*
**Size-Overall**9%
*“The size is consistent and the surface looks clean and bright white”*
**Strength**7%
*“sturdy”*
**Soft Feel**7%
*“Soft balls”*
**Advertised Vs Actual Product**7%
*“Exactly as described”*
**Suitable For Indoor**6%
*“Just a good indoor ball for the price”*
**Noise Level**6%
*“do not make much noise on their own”*
**Safety Standards**4%
*“Safer to play with — nothing broken”*
### **What buyers complain about **
**Size-Overall**31%
*“They are small”*
**Advertised Vs Actual Product**22%
*“Inaccurate Size Claim”*
**Choking**17%
*“Choking hazard”*
**Value For Money**17%
*“Not worth $1 a ball”*
### **Top return reasons **
**Size-Overall**71%
**Advertised Vs Actual Product**5%
**Hard Feel**4%
**Value For Money**4%
**Material Quality**3%
**Weight Light**2%
**Functionality-Overall**2%
**Soft Feel**2%
**Weight Heavy**1%
**Degree Of Motion**1%
## **Common questions**
- **Is styrofoam balls 4 inch profitable to sell on Amazon United States?**
- The niche generates $37K/yr across 20 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -26.4%. Flapen's verdict: Skip it (38/100).
- **How competitive is the styrofoam balls 4 inch niche?**
- 14 brands and 20 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in styrofoam balls 4 inch?**
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Choking. The return rate is 3.8%.
- **When does demand for styrofoam balls 4 inch peak?**
- Demand peaks in Oct–Nov; the busiest month runs 2.6× the quietest.
- **What does it cost to enter the styrofoam balls 4 inch niche?**
- Listings span $6.68–$28.22; the average listing price is $15.22 (sweet spot $15–$100). The average incumbent carries 499 reviews — the moat a new listing must climb.
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