Is plastic shims profitable to sell on Amazon United States?

The niche generates $228K/yr across 24 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +32.1%. Flapen's verdict: Worth a look (59/100).

How competitive is the plastic shims niche?

16 brands and 18 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 68% of demand.

What do buyers complain about in plastic shims?

Top complaints mined from reviews: Size-Overall, Strength, Flexibility. The return rate is 1.8%.

When does demand for plastic shims peak?

Demand peaks in May–Jun; the busiest month runs 1.8× the quietest.

What does it cost to enter the plastic shims niche?

Listings span $4.70–$26.55; the average listing price is $13.38 (sweet spot $15–$100). The average incumbent carries 979 reviews — the moat a new listing must climb.

plastic shims

Worth a look

Shows searches that convert (10.6% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Conversion

Great10.6%

search→purchase rate — share of searches ending in a sale

Returns

Great1.8%

return rate — above 5% kills the launch gate

Review moat

Good978.88

avg incumbent reviews — the moat a new listing must climb

Brand share

Good68%

top-5 brand share — brands hold most of the demand

Avg price

Good$13.38

avg listing price — sweet spot $15–$100

Competition

Good50%

top-5 click share — leaders hold, buyers still browse

Growth

Good+32.1%

90-day search growth — must beat 0% to launch

Price range

Good$4.70–$26.55

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Okay$228K

$228K/yr · 161K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, plastic shims is a $228K/yr Amazon United States market (161K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 59/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

plastic shims market data

Units sold / yr: 15K–20K; avg 500–750/product
Revenue / yr: $201K–$268K; units × avg price
Conversion rate: 10.6%
Avg BSR: #577
Page quality: 0%
Prime: 100%
Sponsored: 96%
Out of stock: 0.8%
Avg brand age: 37 months
Avg seller age: 179 days

Competition & brand share

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

50%

Top 20: 94%

Open market

25%

Stock Your Home26%
WOBBLE WEDGES14%
PROPA11%
ZZJMCH10%
VOCOMO7%
Glazelock7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +32.1% search growth over the last 90 days.

Peak months: May, Jun · busiest ÷ quietest = 1.8×

Open Trend

Top plastic shims search terms

plastic shims81K/yr +27.4%7.7% conv.
plastic shims for leveling29K/yr +13.4%9.7% conv.
plastic wedges shims14K/yr +14.1%5.9% conv.
plastic shims for leveling outdoor5K/yr +585.7%7.7% conv.
plastic shim10K/yr +16.7%5.8% conv.
shims for leveling outdoor4K/yr +506.4%7.5% conv.
window shims6K/yr +21.9%1.4% conv.
masonry shims3K/yr +78.2%2.1% conv.
plastic door shims3K/yr +4.7%4.4% conv.
heavy duty shims3K/yr +44.1%4.2% conv.

All search terms

Top plastic shims 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.

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

Composite Shims (24 Pack) - Hard Composite Shims for Home Improvement - Never Rot for Leveling - Restaurant Table Levelers - Table Wedges - Toilet Levelers - DIY Furniture Levelers - Stock Your Home

Stock Your Home$12.724.7★1,386 rev

ZZJMCH 12 Pack White Multi Purpose Furniture Plastic Shims for Leveling Extreme Weight Capacity Wedges Easy to Snap Cut-to-fit Size Leveler for Toilet Shims Doors Windows Sheds Table

ZZJMCH$5.624.4★642 rev

PROPA$8.974.6★288 rev

Glazelock Prescored Plastic Shims for Leveling (12 Pack) 7-3/8-Inch Length - Professional Quick-Snap Scored Wedges to Level Doors Toilet Shims Windows Cabinets Indoor Outdoor Use - Made in USA

Glazelock$12.894.8★77 rev

Furniture Levelers Flexible Plastic Shims Furniture Leveling Wedge Shims Anti-Wobble Pad for Chair Table Couch Bed Toilet for Home Improvement (Black 20 Pack)

VOCOMO$9.844.4★197 rev

Newest

by launch date

12 Pcs Heavy Duty Plastic Shims for Leveling - Slotted Furniture Wedges for Toilet Windows and Doors Stackable Table Levelers with Anti-Slip Texture Snap-to-Fit Size White

CITLOW$4.7045 rev

6mo ago

Clear Heavy-Duty Plastic Shims Professional Leveling Wedges for Wobbly Toilets Furniture Washers & Commercial Equipment Trim-to-Fit Stackable Non-Slip Floor Protection(Clear 4 Pack)

Generic$6.1180 rev

10mo ago

IANFAN 200 Pack Solid Plastic Shims for Leveling Heavy Duty Composite Shims and Wedges for Furniture Leveling Anti-Skid Leveling Shims for Furniture Table Refrigerators Cabinets Beds (Black)

IANFAN$19.863 rev

10mo ago

PROPA$8.97288 rev

1y ago

Furniture Levelers Flexible Plastic Shims Furniture Leveling Wedge Shims Anti-Wobble Pad for Chair Table Couch Bed Toilet for Home Improvement (Black 20 Pack)

VOCOMO$9.84197 rev

1y ago

What buyers say about plastic shims

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use16%

“Easy to use”

Advertised Vs Actual Product16%

“Just what I needed”

Quality-Overall12%

“Build quality is consistent”

Efficiency10%

“Worked well for my purpose”

Size-Overall6%

“Perfect fit”

Value For Money5%

“Good value”

Durability4%

“easy to break off if you want to”

Strength4%

“Good and sturdy”

Color3%

“The clear color makes them appealing to”

Material Quality3%

“Very strong composite material that you hammer in”

What buyers complain about

Size-Overall35%

“Too small”

Strength8%

“Not as strong as they say”

Flexibility7%

“they tend to bend over time”

Thickness7%

“they are thin”

Material Quality5%

“The plastic / rubber material is very dense”

Weight Heavy3%

“not heavy duty not toilets”

Ease Of Use3%

“Not easy to cut”

Advertised Vs Actual Product2%

“they were incorrectly described”

Quality-Overall1%

“Not the quality that I had hoped for”

Defective Material/Parts1%

“Pieces broke off when I hit into place I wasnt doing it all hard either”

Top return reasons

Size-Overall51%

Advertised Vs Actual Product9%

Functionality-Overall8%

Thin6%

Value For Money5%

Thickness3%