---
title: "One Size Primer — $49K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/one-size-primer"
last_updated: "2026-08-11T03:07:52.637Z"
locale: en
meta:
description: "Niche score 48/100 · $49K/yr market · 102K searches/yr · $25.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $49K/yr market · 102K searches/yr · $25.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "One Size Primer — $49K/yr Amazon US Niche (2026) - Flapen"
---
# **one size primer**
**Skip it**
A small market ($49K/yr) — this niche doesn't clear our bar today.
Market size 12Growth 58Conversion 24Competition 21Returns 97Price range 85Avg price 95Brand share 20Review moat 25Quality gap 97
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$25.67**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$8.09–$62.94**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+33.1%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****4,482.85**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Bad****1.9%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Bad****75%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Market size**
**Bad****$49K**
$49K/yr · 102K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0")
According to Flapen's Amazon United States niche tracking, one size primer is a $49K/yr Amazon United States market (102K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Jan–Feb–Apr. Verdict: Skip it — 48/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **one size primer market data**
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$64K–$77K**
- units × avg price
- **Conversion rate**
- **1.9%**
- **Avg BSR**
- **#388**
- **Page quality**
- **0%**
- **Prime**
- **54%**
- **Sponsored**
- **69%**
- **Out of stock**
- **4.0%**
- **Avg brand age**
- **63 months**
- **Avg seller age**
- **136 days**
## **Competition & brand share**
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**63**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**75%**
Top 20: 100%
**Open market**
**5%**
- Generic74% - One size6% - IFSLQNX5% - Smashbox3% - NYX PROFESSIONAL MAKEUP3% - e.l.f.3% - Open — no brand owns it (2 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +33.1% search growth over the last 90 days.
10K6KSpike '24Holiday '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Apr · busiest ÷ quietest = 3.0×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/one-size-primer/trend)
## **Top one size primer search terms**
- **one size primer**76K/yr+23.8%1.4% conv. - **one size secure the sweat primer**7K/yr+114.4%1.4% conv. - **secure the sweat primer**7K/yr+94.4%1.5% conv. - **onesize primer**4K/yr+22.5%1.3% conv. - **primer one size**4K/yr+15.6%1.0% conv. - **one size sweat proof primer**3K/yr+70.2%1.6% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/one-size-primer/search-terms)
## **Top one size primer 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%15%$7K30%$15K45%$22K60%$29K1101001K10K100K 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 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size:(Mini) (0.33 oz / 10 mL)**Generic**$32.27**3.2★32 rev](https://www.amazon.com/dp/B0F8W93JCR) [2**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size: (0.33 oz / 10 mL) (Mini)**Generic**$32.85**3.6★4 rev](https://www.amazon.com/dp/B0F88M68L4) [3**Long-Lasting Matte Oil Control Primer for Oily Skin Long-Lasting Waterproof Pore-Minimizing Makeup Base Shine Control Face Primer 1 fl oz (30ml)**Generic**$16.78**3.2★4 rev](https://www.amazon.com/dp/B0G3QPSHP7) [4**Secure The Sweat Waterproof Mattifying Primer Travel**Generic**$29.38**3.9★34 rev](https://www.amazon.com/dp/B0F2YGF5D7) [5**One Size Secure The Blur Makeup Magnet Primer 35ml / 1.2fl.oz.**One size**$34.01**4.6★214 rev](https://www.amazon.com/dp/B08Y6574PV)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Long-Lasting Matte Oil Control Primer for Oily Skin Long-Lasting Waterproof Pore-Minimizing Makeup Base Shine Control Face Primer 1 fl oz (30ml)**Generic**$16.78**4 rev7mo ago](https://www.amazon.com/dp/B0G3QPSHP7) [**O/S by P-Starr - Secure the Blur Makeup Magnet Primer Pore-Blurring Shine Control Long-Lasting Flawless Finish Lightweight Primer for All Skin Types - Size: (1.18 oz / 35 mL)**Generic**$62.94**0 rev10mo ago](https://www.amazon.com/dp/B0FQ477355) [**ONE/SIZE by Patrick Starrr Secure The Blur Makeup Magnet Primer 1.2 fl oz Pore Blurring Mattifying All-Day Wear**Generic**$59.98**1 rev1y ago](https://www.amazon.com/dp/B0DWBJNGGF) [**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size:(Mini) (0.33 oz / 10 mL)**Generic**$32.27**32 rev1y ago](https://www.amazon.com/dp/B0F8W93JCR) [**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size: (0.33 oz / 10 mL) (Mini)**Generic**$32.85**4 rev1y ago](https://www.amazon.com/dp/B0F88M68L4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Long-Lasting Matte Oil Control Primer for Oily Skin Long-Lasting Waterproof Pore-Minimizing Makeup Base Shine Control Face Primer 1 fl oz (30ml)**Generic**$16.78**3.2★**▲ 312%**](https://www.amazon.com/dp/B0G3QPSHP7) [**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size: (0.33 oz / 10 mL) (Mini)**Generic**$32.85**3.6★**▲ 110%**](https://www.amazon.com/dp/B0F88M68L4) [**Oil Sucker Extreme Mattifying Alkaline Primer oil sucker primer makeup Mattifying for Oily Skin Waterproof Mattifying for All Skin Types (1pcs)**IFSLQNX**$8.87**3.9★**▲ 45%**](https://www.amazon.com/dp/B0DDL9YRDQ) [**O/S by P-Starr - Secure The Sweat Waterproof Mattifying Primer waterproof Up to 12 hours of oil resistance - Size:(Mini) (0.33 oz / 10 mL)**Generic**$32.27**3.2★**▲ 38%**](https://www.amazon.com/dp/B0F8W93JCR) [**ONE/SIZE by Patrick Starrr Secure The Blur Makeup Magnet Primer 1.2 fl oz Pore Blurring Mattifying All-Day Wear**Generic**$59.98**1.0★**▲ 17%**](https://www.amazon.com/dp/B0DWBJNGGF)
**~~View all trending →~~**
## **What buyers say about one size primer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“This is a great, affordable product”*
**Value For Money**11%
*“Great for the price”*
**Suitability Combination Skin**9%
*“It smooths the skin”*
**Soft Feel**7%
*“It is smooth”*
**Adhesion/Stickiness**6%
*“It adheres well”*
**Durability**5%
*“it stays on all day”*
**Moist/Dry**3%
*“Keeps me hydrated”*
**Suitability Oily Skin**3%
*“Great product for oily skin”*
**Weight Light**3%
*“This primer lightweight”*
**Advertised Vs Actual Product**3%
*“Does what it says”*
### **What buyers complain about **
**Adhesion/Stickiness**18%
*“did the test run it didnt stick”*
**Size-Overall**14%
*“This is a tiny bottle”*
**Value For Money**9%
*“not worth the price”*
**Grip**5%
*“Not really grippy”*
**Functionality-Overall**4%
*“Doesn't work”*
**Moist/Dry**3%
*“cling to any dry spots”*
**Quality-Overall**3%
*“absolute trash”*
**Allergies**2%
*“Seemed to make it worse”*
**Ease Of Application**2%
*“I dont like the feeling after applying it”*
**Suitability Combination Skin**2%
*“Worst primer for combination skin”*
### **Top return reasons **
**Size-Overall**25%
**Functionality-Overall**15%
**Adhesion/Stickiness**12%
**Advertised Vs Actual Product**8%
**Value For Money**5%
**Product Condition**3%
**Texture/Consistency-Overall**3%
**Material Quality**2%
**Defective Material/Parts**2%
**Oily/Greasy**2%
## **Common questions**
- **Is one size primer profitable to sell on Amazon United States?**
- The niche generates $49K/yr across 13 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +33.1%. Flapen's verdict: Skip it (48/100).
- **How competitive is the one size primer niche?**
- 8 brands and 63 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in one size primer?**
- Top complaints mined from reviews: Adhesion/Stickiness, Size-Overall, Value For Money. The return rate is 0.7%.
- **When does demand for one size primer peak?**
- Demand peaks in Jan–Feb–Apr; the busiest month runs 3.0× the quietest.
- **What does it cost to enter the one size primer niche?**
- Listings span $8.09–$62.94; the average listing price is $25.67 (sweet spot $15–$100). The average incumbent carries 4,483 reviews — the moat a new listing must climb.
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