kirby birthday party decorations
Skip itA small market ($75K/yr) — this niche doesn't clear our bar today.
Review moat
Great374.52avg incumbent reviews — the moat a new listing must climb
Returns
Great2.0%return rate — above 5% kills the launch gate
Brand share
Good61%top-5 brand share — brands hold most of the demand
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Avg price
Good$13.52avg listing price — sweet spot $15–$100
Conversion
Good4.2%search→purchase rate — share of searches ending in a sale
Price range
Good$5.46–$24.90cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-7.0%90-day search growth — must beat 0% to launch
Market size
Bad$75K$75K/yr · 132K searches
According to Flapen's Amazon United States niche tracking, kirby birthday party decorations is a $75K/yr Amazon United States market (132K searches/yr). The top 5 brands hold 61% of demand. Verdict: Skip it — 48/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
kirby birthday party decorations market data
- Units sold / yr
- 5K–6K
- avg 100–250/product
- Revenue / yr
- $68K–$81K
- units × avg price
- Conversion rate
- 4.2%
- Avg BSR
- #2,905
- Page quality
- 0%
- Prime
- 97%
- Sponsored
- 35%
- Out of stock
- 7.9%
- Avg brand age
- 29 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
23 falling
Sellers
68
Top-5 brand share
61%
Top 20: 98%
Top-5 click share
47%
Top 20: 88%
Open market
34%
- SDONY16%
- karg14%
- Generic12%
- LDAKZFV11%
- PRISIA7%
- ELZEM4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -7.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 2.0×
Top kirby birthday party decorations search terms
- kirby birthday party decorations43K/yr
- kirby party decorations21K/yr
- kirby birthday15K/yr
- kirby party favors12K/yr
- kirby balloons9K/yr
- kirby birthday decorations10K/yr
- kirby decorations8K/yr
- kirby party supplies8K/yr
- kirby party6K/yr
Top kirby birthday party decorations 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
karg Birthday Party Supplies Favors for Boys Kids Super Star Birthday Party Decorations Including Tableware Backdrop Cake Cupcake Toppers Ballons
karg$18.384.7★81 rev
Kirby Party Supplies Party Supplies 40pcs include 20 plates 20 napkins for Kirby Party party decoration
LDAKZFV$15.674.1★6 rev
Cartoon Kirbies Birthday Photography Backdrop 5x3ft Photo Background Cartoon Star Happy Birthday Banner for Party Supplies Decorations (5x3ft)
Generic$16.184.6★40 rev
Cartoon Star Birthday Party Supplies for Kirbayy Star Birthday Party Decorations Including dinner plates napkins Ballons and tablecloth for Kirbies Party Supplies
PRISIA$15.855.0★2 rev
Star Birthday Decorations Star Party Supplies Include Happy Birthday Banner Cake Topper and Cupcake Toppers Balloons for Kids Party Decor
SDONY$20.014.4★4 rev
Newest
by launch dateCartoon Star Birthday Party Supplies for Kirbayy Star Birthday Party Decorations Including dinner plates napkins Ballons and tablecloth for Kirbies Party Supplies
PRISIA$15.852 rev
42Pack Cartoon Star Game Backdrop Banner Cake Topper and Balloons Set
Auysbytdd$16.920 rev
Star Birthday Decorations Star Party Supplies Include Happy Birthday Banner Cake Topper and Cupcake Toppers Balloons for Kids Party Decor
SDONY$20.014 rev
8Pcs Star Honeycomb Table Centerpiece Star Birthday Party Supplies Table Decorations for Kids Party Decorations
SDONY$16.912 rev
Cartoon Star Birthday Party Backdrop and Decoration Kirbyy Banner Cake Topper Shoot Photo Background Props for Boys and Girls - 5x3ft
Ezcpigei$13.713 rev
Trending
90-day click momentum42Pack Cartoon Star Game Backdrop Banner Cake Topper and Balloons Set
Auysbytdd$16.920.0★
Cartoon Game Party Decorations Star Birthday Party Supplies Includes Banner- Cake Topper - 24 Cupcake Toppers - 18 Balloons
ELZEM$12.504.6★
Cartoon Star Birthday Party Supplies for Kirbayy Star Birthday Party Decorations Including dinner plates napkins Ballons and tablecloth for Kirbies Party Supplies
PRISIA$15.855.0★
Bioworld Kirby Character & Stars All-Over Print Womens White Crew Neck Short Sleeve Baby Tee-Medium
Bioworld$12.654.5★
Cartoon Star Birthday Party Backdrop and Decoration Kirbyy Banner Cake Topper Shoot Photo Background Props for Boys and Girls - 5x3ft
Ezcpigei$13.713.5★
What buyers say about kirby birthday party decorations
What buyers praise and complain about, mined from review topics.What buyers love
“Cute Product”
“Came exactly as pictured”
“Definitely worth the buy”
“The designs are cute”
“Hilarious Kirby stickers”
“Cute gift”
“bright colors”
“Good size”
“They stick in place and are bright and colorful”
“easy to use”
What buyers complain about
“Small”
“Super thin”
“The balloons smell really bad”
“don't stay sticky for a while”
“so I couldn't put it together the intended way”
“I don't think this is worth the buy”
“Terrible quality”
“It broke the day my daughter opened it”
“Colors might be a little dark”
“Deflated very quickly”
Top return reasons
Common questions
- Is kirby birthday party decorations profitable to sell on Amazon United States?
- The niche generates $75K/yr across 31 tracked products. 1 of 13 products launched in the last 360 days are still selling. 90-day search growth is -7.0%. Flapen's verdict: Skip it (48/100).
- How competitive is the kirby birthday party decorations niche?
- 23 brands and 68 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 61% of demand.
- What do buyers complain about in kirby birthday party decorations?
- Top complaints mined from reviews: Size-Overall, Thickness, Smell. The return rate is 2.0%.
- When does demand for kirby birthday party decorations peak?
- Demand is steady year-round — the busiest month runs 2.0× the quietest.
- What does it cost to enter the kirby birthday party decorations niche?
- Listings span $5.46–$24.90; the average listing price is $13.52 (sweet spot $15–$100). The average incumbent carries 375 reviews — the moat a new listing must climb.