diary of a wimpy kid costume
Skip itSoft demand (-99.3% this quarter) — this niche doesn't clear our bar today.
Review moat
Incredible34.54avg incumbent reviews — the moat a new listing must climb
Returns
Great2.0%return rate — above 5% kills the launch gate
Avg price
Good£12.39avg listing price — sweet spot $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Conversion
Okay3.0%search→purchase rate — share of searches ending in a sale
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Price range
Okay£6.90–£18.99cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Bad96%top-5 brand share — brand-locked demand
Market size
Bad£35K£35K/yr · 95K searches
Growth
Bad-99.3%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, diary of a wimpy kid costume is a £35K/yr Amazon United Kingdom market (95K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 33/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
diary of a wimpy kid costume market data
- Units sold / yr
- 750–1K
- avg 0–100/product
- Revenue / yr
- £9K–£12K
- units × avg price
- Conversion rate
- 3.0%
- Avg BSR
- #4,456
- Page quality
- 0%
- Prime
- 46%
- Sponsored
- 46%
- Out of stock
- 0.0%
- Avg brand age
- 35 months
- Avg seller age
- 202 days
Competition & brand share
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.Brands
7 rising
Sellers
8
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
63%
Top 20: 100%
Open market
4%
- Kavoc26%
- Vagile25%
- STREETWISE CLOTHING QUALITY CASUAL WEAR18%
- SMARTYPANTS10%
- Postees8%
- Diary Of A Wimpy Kid8%
- Open — no brand owns it (1 brand, 4%)
Demand
Weekly Amazon search volume, last 20 weeks — -99.3% search growth over the last 90 days.Top diary of a wimpy kid costume search terms
- diary of a wimpy kid costume69K/yr
- diary of a wimpy kid t shirt5K/yr
- diary of a wimpy kid tshirt5K/yr
- wimpy kid costume13K/yr
- diary of wimpy kid costume3K/yr
Top diary of a wimpy kid costume 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kavoc 3Pcs Halloween Costume Set Including Black White Striped T-shirt Black Socks Shorts (10-12Years Old)
Kavoc£14.304.9★8 rev
STREETWISE CLOTHING QUALITY CASUAL WEAR World Book Day T Shirt Diary of a Wimpy Reading Shirt Kids Book Day Outfit for School Classroom Reading Fun White 9-11Y
STREETWISE CLOTHING QUALITY CASUAL WEAR£11.134.8★14 rev
Vagile Kid Diary Inspired by World Book Day Wimpy Kids T-Shirt White
Vagile£9.724.3★18 rev
SMARTYPANTS Diary of a Whimpy Kid T-Shirt Top Tee - World Book Day Kids Childs Funny School Greg Cartoon Face Doodle Humor Present Gift (9-11 Years White Prime)
SMARTYPANTS£10.854.1★48 rev
Vagile Kid Diary Inspired by World Book Day Wimpy Kids T-Shirt Green
Vagile£9.954.3★18 rev
Newest
by launch dateSTREETWISE CLOTHING QUALITY CASUAL WEAR World Book Day T Shirt Diary of a Wimpy Reading Shirt Kids Book Day Outfit for School Classroom Reading Fun White 9-11Y
STREETWISE CLOTHING QUALITY CASUAL WEAR£11.1314 rev
STREETWISE CLOTHING QUALITY CASUAL WEAR World Book Day T Shirt Diary of a Wimpy Reading Shirt Kids Book Day Outfit for School Classroom Reading Fun Red 9-11Y
STREETWISE CLOTHING QUALITY CASUAL WEAR£10.7914 rev
Kavoc 4Pcs Movie Cartoon Character Costume Include White Beanie Hat T-shirt Black Short Pants and Striped Socks for Book Week Cosplay (M)
Kavoc£15.678 rev
Kavoc 4Pcs Movie Cartoon Character Costume Include White Beanie Hat T-shirt Black Short Pants and Striped Socks for Book Week Cosplay (S)
Kavoc£15.448 rev
Diary of a Wimpy Kid Best Friends Sketch with Logo Funny T-Shirt
Diary Of A Wimpy Kid£18.995 rev
Trending
90-day click momentumVagile Kid Diary Inspired by World Book Day Wimpy Kids T-Shirt White
Vagile£9.864.3★
Vagile Kid Diary Inspired by World Book Day Wimpy Kids T-Shirt Green
Vagile£9.954.3★
Vagile Kid Diary Inspired by World Book Day Wimpy Kids T-Shirt White
Vagile£9.724.3★
Kavoc 3Pcs Halloween Costume Set Including Black White Striped T-shirt Black Socks Shorts (10-12Years Old)
Kavoc£14.304.9★
SMARTYPANTS Diary of a Whimpy Kid T-Shirt Top Tee - World Book Day Kids Childs Funny School Greg Cartoon Face Doodle Humor Present Gift (9-11 Years White Prime)
SMARTYPANTS£10.854.1★
What buyers say about diary of a wimpy kid costume
What buyers praise and complain about, mined from review topics.What buyers love
“Perfect sizing”
“Good quality t shirt and print and has washed well so far”
“Great gift for Wimpy Kid fan”
“washes really well”
“Great material”
“the overall quality feels above what youd expect at this price point”
“I also appreciate that the design feels unisex rather than geared solely toward boys”
“the fabric is soft yet durable”
“easy to style for anyone”
“I noticed how well made each piece feels — the stitching is solid”
What buyers complain about
“Poor quality material”
“horrible smell to it as well”
“comes up small”
“Not worth the money”
Top return reasons
Common questions
- Is diary of a wimpy kid costume profitable to sell on Amazon United Kingdom?
- The niche generates £35K/yr across 13 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -99.3%. Flapen's verdict: Skip it (33/100).
- How competitive is the diary of a wimpy kid costume niche?
- 7 brands and 8 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in diary of a wimpy kid costume?
- Top complaints mined from reviews: Material Quality, Smell, Size-Overall. The return rate is 2.0%.
- What does it cost to enter the diary of a wimpy kid costume niche?
- Listings span £6.90–£18.99; the average listing price is £12.39 (sweet spot $15–$100). The average incumbent carries 35 reviews — the moat a new listing must climb.