mario and luigi costumes kids
Skip itA small market ($16K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$26.65avg listing price — sweet spot $15–$100
Price range
Incredible$15.75–$40.53cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Review moat
Good1,035.82avg incumbent reviews — the moat a new listing must climb
Brand share
Okay78%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Okay+1.5%90-day search growth — must beat 0% to launch
Conversion
Bad1.9%search→purchase rate — share of searches ending in a sale
Returns
Bad6.5%return rate — above 6% kills the launch gate
Market size
Bad$16K$16K/yr · 33K searches
Competition
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
11 rising
Sellers
49
Top-5 brand share
78%
Open market
16%
- Nintendo30%
- Disguise22%
- Mavoka12%
- QRT8%
- CGD7%
- Get Trend7%
- Open — no brand owns it (5 brands, 16%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nintendo Super Mario Brothers Boys Long Sleeve Onesie Zip Coverall with Hoodie Luigi Cosplay Zip Up Onesie for Kids (Green and Blue Size 7)
Nintendo$28.004.8★246 rev
Disguise Nintendo Super Mario Costume Officially Licensed Super Mario Brothers Boys Costume Classic Child Size Medium (7-8)
Disguise$26.144.6★7,924 rev
Plumber Costume for Kids Shirt Overalls Glove Boys Halloween Party Cosplay 3T Red
Mavoka$20.344.4★91 rev
QRT Super Bros Costume Kit with Hat Mustaches Suspenders Gloves Buttons ang Glasses frame for Halloween Cosplay and Christmas (red&green)
QRT$22.714.5★140 rev
CGD Super Bros Costume Set with Hat Mustache Suspenders for Halloween Instant Dress Up Kit for Cosplay & Christmas
CGD$19.854.6★45 rev
Newest
by launch dateCGD Super Bros Costume Set with Hat Mustache Suspenders for Halloween Instant Dress Up Kit for Cosplay & Christmas
CGD$19.8545 rev
Super Mario Kids Baseball Cap & Sunglasses with UV Protection Adjustable Sun Hat Gaming Gifts for Boys Ages 614 (Green Super Mario)
Get Trend$20.86146 rev
Super Mario Kids Baseball Cap & Sunglasses with UV Protection Adjustable Sun Hat Gaming Gifts for Boys Ages 614 (Red Super Mario)
Get Trend$25.06146 rev
Humairc Super Bros Hats Accessories Set Mary Luigy Caps Mustaches Suspenders Gloves Buttons Halloween Cosplay Costume (GREEN&RED&SUSPENDER)
Humairc$24.78227 rev
QRT Super Bros Costume Kit with Hat Mustaches Suspenders Gloves Buttons ang Glasses frame for Halloween Cosplay and Christmas (red&green)
QRT$22.71140 rev
Trending
90-day click momentumNintendo Super Mario Brothers Boys Long Sleeve Onesie Zip Coverall with Hoodie Luigi Cosplay Zip Up Onesie for Kids (Green and Blue Size 14/16)
Nintendo$38.574.8★
Super Mario Kids Baseball Cap & Sunglasses with UV Protection Adjustable Sun Hat Gaming Gifts for Boys Ages 614 (Green Super Mario)
Get Trend$20.864.7★
Super Mario Kids Baseball Cap & Sunglasses with UV Protection Adjustable Sun Hat Gaming Gifts for Boys Ages 614 (Red Super Mario)
Get Trend$25.064.7★
Nintendo Super Mario Bomber Jacket for Boys Mario and Luigi Bomber Jacket (Bros. Blue Size 5/6)
Nintendo$40.534.8★
Mavoka Plumber Costume for Kids Shirt Overalls Glove Boys Halloween Party Cosplay 7-8 Years Green
Mavoka$23.294.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +1.5% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 86.6×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Good for the price”
“The quality is excellent — the colors are vibrant”
“they fit me pretty well”
“Simple”
“Can be enjoyed by two children”
“Just as advertised”
“The colors are bright”
“the suspenders adjust easily”
“are very comfortable”
“the materials feel sturdy enough for a night of trick-or-treating or multiple wears”
What buyers complain about
“Too small”
“These are pretty cheap”
“It looks previously used”
“broke after one try”
“Much thicker than expected”
“the pair I did receive were dirty”
“the material is super cheap the buttons had to be sewn on”
“For $30 thats a shame”
“It was very uncomfortable on my large head”
“Dont really hold up their shape”