Is 18th birthday plates profitable to sell on Amazon United States?

The niche generates $53K/yr across 86 tracked products. 1 of 33 products launched in the last 360 days are still selling. 90-day search growth is -27.8%. Flapen's verdict: Worth a look (54/100).

How competitive is the 18th birthday plates niche?

48 brands and 49 sellers compete. The top 5 products take 20% of clicks and top 5 brands hold 39% of demand.

What do buyers complain about in 18th birthday plates?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 2.9%.

When does demand for 18th birthday plates peak?

Demand peaks in Jan; the busiest month runs 1.9× the quietest.

What does it cost to enter the 18th birthday plates niche?

Listings span $4.63–$36.53; the average listing price is $12.49 (sweet spot $15–$100). The average incumbent carries 228 reviews — the moat a new listing must climb.

18th birthday plates

Worth a look

Shows a fragmented shelf (top 5 take 20% of clicks), but soft demand (-27.8% this quarter) keeps it on the watch list.

Competition

Great20%

top-5 click share — an open shelf

Brand share

Incredible39%

top-5 brand share — no brand owns this niche

Review moat

Great228.27

avg incumbent reviews — the moat a new listing must climb

Conversion

Great7.2%

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

Price range

Good$4.63–$36.53

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

Returns

Good2.9%

return rate — above 5% kills the launch gate

Avg price

Good$12.49

avg listing price — sweet spot $15–$100

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$53K

$53K/yr · 59K searches

Growth

Bad-27.8%

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

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, 18th birthday plates is a $53K/yr Amazon United States market (59K searches/yr). The top 5 brands hold 39% of demand. Demand peaks in Jan. Verdict: Worth a look — 54/100.

Data updated Jul 23, 2026 · scored weekly · How we score niches

18th birthday plates market data

Units sold / yr: 4K–5K; avg 0–100/product
Revenue / yr: $50K–$62K; units × avg price
Conversion rate: 7.2%
Avg BSR: #2,168
Page quality: 0%
Prime: 100%
Sponsored: 78%
Out of stock: 10.3%
Avg brand age: 24 months
Avg seller age: 218 days

Competition & brand share

Clicks spread well past the top 5 (20% combined) — an open shelf where new products get seen.

Brands

48 falling

Sellers

Top-5 brand share

39%

Top 20: 78%

Top-5 click share

20%

Top 20: 51%

Open market

55%

KHAIVI14%
Juhap7%
Greencian7%
Hokinaa6%
Oitnlaughter5%
gisgfim5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -27.8% search growth over the last 90 days.

Peak months: Jan · busiest ÷ quietest = 1.9×

Open Trend

Top 18th birthday plates search terms

18th birthday plates26K/yr -21.4%4.4% conv.
18th birthday plates and napkins22K/yr -38.4%5.7% conv.
18th birthday napkins11K/yr -17.3%5.7% conv.

All search terms

Top 18th birthday plates 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★)1 product 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

40PCS Happy 18th Birthday Decrations for Men Women Blue and Silver Themed Disposable Party Favors Includeing Plates and Napkins for Eighteen Year Old Party Decorations

KHAIVI$9.054.5★434 rev

40Pcs 18th Birthday Decorations for Boys Girls 18th Birthday Plates and Napkins Black and White Disposable Party Tableware Set for Time To Adult 18 Years Old Party Favor Serve 20

DURYGEN$9.104.6★174 rev

40Pcs 18th Birthday Decorations for Boys Girls Happy 18th Birthday Black Gold Birthday Plates Napkins Dinnerware for Her Him 18 Years Old Birthday Party Favor

KHAIVI$9.414.5★595 rev

40PCS 18th Birthday Decorations for Girls Rose Gold Birthday Party Decorations Supplies Included Paper Plates and Napkins Happy 18 Years Birthday Party Tableware Set for 24 Guests

KHAIVI$9.494.6★1,189 rev

Hokinaa 18th Birthday Party Decorations - 96 Pcs Vintage Newspaper Paper Plates Napkins Forks Set Tableware Disposable Happy Bday Cheers to 18 Year Old Decor Supplies for Men Women Serves 24 Guests

Hokinaa$16.454.6★61 rev

Newest

by launch date

Hokinaa 18th Birthday Party Decorations - 96 Pcs Vintage Newspaper Paper Plates Napkins Forks Set Tableware Disposable Happy Bday Cheers to 18 Year Old Decor Supplies for Men Women Serves 24 Guests

Hokinaa$16.4561 rev

3mo ago

Hokinaa 18th Birthday Party Decorations - 50 Pcs Vintage Newspaper Back in 2008 Paper Napkins Set Disposable Happy Cheers to 18 Year Old Dinner Cocktail Table Lunch Decor Supplies for Men Women Guest

Hokinaa$8.5041 rev

4mo ago

Bonjour Fte 18th Birthday Hot Pink Striped Paper Cocktail Napkins | Premium Party Supplies | Pink Foil Detail | Milestone Celebration Dessert Table & Birthday Party | Pack of 20 5 Folded

Bonjour Fete$8.770 rev

5mo ago

20 Pcs 9 Inch 18th Birthday Plates Official Blue & Silver 18th Birthday Theme Tableware Party Plate Set Disposable Paper Plates Legal Milestone Happy 18th Birthday Decorations Supplies Serves 20

Cekivina$7.9837 rev

7mo ago

Greencian 96Pcs Happy 18th Birthday Party Decorations Serves 24

Greencian$19.8616 rev

7mo ago

What buyers say about 18th birthday plates

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

What buyers love

Quality-Overall29%

“Excellent for Any Occasion”

Advertised Vs Actual Product12%

“As advertised”

Value For Money11%

“Great value”

Color8%

“Colors were great”

Brightness/Shine/Glow7%

“This light easily and looked nice”

Size-Overall5%

“They was a perfect size”

Durability5%

“also get the job done with their durability”

Strength4%

“These were sturdy”

Thickness3%

“The napkins were nice quality, thick enough, not thin and cheap feeling”

Efficiency2%

“Worked well”

What buyers complain about

Size-Overall28%

“very small”

Quality-Overall19%

“Cheaply made”

Advertised Vs Actual Product13%

“Misleading”

Strength13%

“The plates were flimsy and kept cracking during my dinner and falling apart”

Value For Money13%

“not worth the money”

Thickness6%

“not a super thick plastic”

Smell6%

“Smell is strong”

Top return reasons

Size-Overall32%

Color25%

Value For Money15%

Quality-Overall8%

Advertised Vs Actual Product8%

Display Colors2%

Product Condition2%

Material Quality1%

Brightness/Shine/Glow1%

Smell1%

Common questions

Is 18th birthday plates profitable to sell on Amazon United States?: The niche generates $53K/yr across 86 tracked products. 1 of 33 products launched in the last 360 days are still selling. 90-day search growth is -27.8%. Flapen's verdict: Worth a look (54/100).
How competitive is the 18th birthday plates niche?: 48 brands and 49 sellers compete. The top 5 products take 20% of clicks and top 5 brands hold 39% of demand.
What do buyers complain about in 18th birthday plates?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 2.9%.
When does demand for 18th birthday plates peak?: Demand peaks in Jan; the busiest month runs 1.9× the quietest.
What does it cost to enter the 18th birthday plates niche?: Listings span $4.63–$36.53; the average listing price is $12.49 (sweet spot $15–$100). The average incumbent carries 228 reviews — the moat a new listing must climb.