clam shells
Worth a lookShows demand growing +92.3% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Great+92.3%90-day search growth — must beat 0% to launch
Brand share
Great48%top-5 brand share — no brand owns this niche
Avg price
Great$19.25avg listing price — sweet spot $15–$100
Competition
Great34%top-5 click share — an open shelf
Review moat
Great396.61avg incumbent reviews — the moat a new listing must climb
Price range
Good$7.81–$143.36cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good5.2%search→purchase rate — share of searches ending in a sale
Returns
Good2.6%return rate — above 5% kills the launch gate
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$177K$177K/yr · 176K searches
According to Flapen's Amazon United States niche tracking, clam shells is a $177K/yr Amazon United States market (176K searches/yr). The top 5 brands hold 48% of demand. Demand peaks in Jun–Jul. Verdict: Worth a look — 68/100.
Data updated Aug 3, 2026 · scored weekly · How we score niches
clam shells market data
- Units sold / yr
- 8K–10K
- avg 100–250/product
- Revenue / yr
- $154K–$193K
- units × avg price
- Conversion rate
- 5.2%
- Avg BSR
- #452
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 96%
- Out of stock
- 0.4%
- Avg brand age
- 33 months
- Avg seller age
- 181 days
Competition & brand share
Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.Brands
34 rising
Sellers
41
Top-5 brand share
48%
Top 20: 89%
Top-5 click share
34%
Top 20: 74%
Open market
47%
- SEAJIAYI15%
- ReePlan11%
- WeDoSoy10%
- Mkobon6%
- LAMIVORA6%
- PEPPERLONELY5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +92.3% search growth over the last 90 days.Peak months: Jun, Jul · busiest ÷ quietest = 2.6×
Top clam shells search terms
- clam shells40K/yr
- clam shells for crafts31K/yr
- shells for decoupage18K/yr
- large shells for crafts14K/yr
- large seashells for crafts11K/yr
- clam shell15K/yr
- large clam shells9K/yr
- large scallop shells9K/yr
- large clam shells for crafts6K/yr
- large scallop shells for crafts6K/yr
Top clam shells 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SEAJIAYI 10 PCS Large Scallop Shells 4-5 inch Natural White Scallop Shells from Sea Beach for DIY Craft Decor
SEAJIAYI$14.234.4★1,616 rev
10PCS Large Natural Scallop Shells 4-5 Large Shell for Crafts DIY Painting Baking and Beach Wedding Decorations - Large White Seashells Bulk for Ocean Themed Parties and Home Decor
WeDoSoy$14.734.7★336 rev
20PCS Natural Scallop Shells for Crafts 4-5 in White Sea Shells DIY Decor
ReePlan$18.454.6★142 rev
SEAJIAYI 30 PCS Scallop Shells 2-3 Inch Natural White Sea Shells from Sea Beach for DIY Craft Home Dcor(6-8 cm)
SEAJIAYI$11.544.4★1,616 rev
10PCS Natural Scallop Shells for Crafts 4-5 in White Sea Shells DIY Decor
ReePlan$10.754.6★142 rev
Newest
by launch date
LAMIVORA 20Pcs 4-5 Inch Large Scallop Shells for Crafts
LAMIVORA$18.9543 rev
LAMIVORA 30Pcs 4-5 Inch Concave Large Oyster Shells for Crafts
LAMIVORA$26.4964 rev
DOODLEBEAN 4-5 30 PCS Large Scallop Shells for Crafts Natural Sea Shells for DIY Crafting White Seashells Bulk for Decorating Painting Ocean Themed Party Supplies & Home Shell Decor
DOODLEBEAN$21.3642 rev
Denking Large Scallop Shells 20 PCS 3.5-4 Inch
denking$21.2364 rev
10PCS Natural Scallop Shells for Crafts 4-5 in White Sea Shells DIY Decor
ReePlan$10.75142 rev
Trending
90-day click momentumLAMIVORA 30Pcs 4-5 Inch Concave Large Oyster Shells for Crafts
LAMIVORA$26.494.0★
LAMIVORA 20Pcs 4-5 Inch Large Scallop Shells for Crafts
LAMIVORA$18.954.7★
DOODLEBEAN 4-5 30 PCS Large Scallop Shells for Crafts Natural Sea Shells for DIY Crafting White Seashells Bulk for Decorating Painting Ocean Themed Party Supplies & Home Shell Decor
DOODLEBEAN$21.364.5★
10PCS Natural Scallop Shells for Crafts 4-5 in White Sea Shells DIY Decor
ReePlan$10.754.6★
Denking Large Scallop Shells 20 PCS 3.5-4 Inch
denking$21.234.5★
What buyers say about clam shells
What buyers praise and complain about, mined from review topics.What buyers love
“Perfect Size Containers”
“The quality makes them very versatile”
“Good for the price”
“As advertised”
“the color is pretty”
“They are clean and flawless”
“have added a touch of elegance to my home decor”
“Durable & sturdy”
“not flimsy”
“These containers are very handy”
What buyers complain about
“Very small”
“Poor quality control”
“had a fishy smell”
“Not sturdy”
“The material is not as thick as I thought it would be”
“It wasn't cheap to buy”
“False advertising”
“Awful for Painting Projects”
“You feel like youre covered in bacteria while you clean them”
“Were not all perfectly shaped”
Top return reasons
Common questions
- Is clam shells profitable to sell on Amazon United States?
- The niche generates $177K/yr across 51 tracked products. 11 of 16 products launched in the last 360 days are still selling. 90-day search growth is +92.3%. Flapen's verdict: Worth a look (68/100).
- How competitive is the clam shells niche?
- 34 brands and 41 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 48% of demand.
- What do buyers complain about in clam shells?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Smell. The return rate is 2.6%.
- When does demand for clam shells peak?
- Demand peaks in Jun–Jul; the busiest month runs 2.6× the quietest.
- What does it cost to enter the clam shells niche?
- Listings span $7.81–$143.36; the average listing price is $19.25 (sweet spot $15–$100). The average incumbent carries 397 reviews — the moat a new listing must climb.