Is onesies for men profitable to sell on Amazon United Kingdom?

The niche generates £23K/yr across 118 tracked products. 0 of 26 products launched in the last 360 days are still selling. 90-day search growth is -56.8%. Flapen's verdict: Skip it (48/100).

How competitive is the onesies for men niche?

49 brands and 56 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 41% of demand.

What do buyers complain about in onesies for men?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Stitch/Finish/Polish. The return rate is 3.4%.

When does demand for onesies for men peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 19.0× the quietest.

What does it cost to enter the onesies for men niche?

Listings span £7.39–£31.75; the average listing price is £18.69 (sweet spot $15–$100). The average incumbent carries 831 reviews — the moat a new listing must climb.

onesies for men

Skip it

Soft demand (-56.8% this quarter) — this niche doesn't clear our bar today.

Competition

Incredible19%

top-5 click share — an open shelf

Brand share

Great41%

top-5 brand share — no brand owns this niche

Avg price

Great£18.69

avg listing price — sweet spot $15–$100

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Price range

Good£7.39–£31.75

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

Review moat

Good830.83

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.4%

return rate — above 5% kills the launch gate

Market size

Bad£23K

£23K/yr · 437K searches

Conversion

Bad0.3%

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

Growth

Bad-56.8%

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

Signals No Dominant Brand

According to Flapen's Amazon United Kingdom niche tracking, onesies for men is a £23K/yr Amazon United Kingdom market (437K searches/yr). The top 5 brands hold 41% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 48/100.

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

onesies for men market data

Units sold / yr: 3K–3K; avg 0–100/product
Revenue / yr: £47K–£56K; units × avg price
Conversion rate: 0.3%
Avg BSR: #1,715
Page quality: 0%
Prime: 64%
Sponsored: 85%
Out of stock: 18.5%
Avg brand age: 45 months
Avg seller age: 188 days

Competition & brand share

Clicks spread well past the top 5 (19% combined) — an open shelf where new products get seen.

Brands

49 falling

Sellers

Top-5 brand share

41%

Top 20: 81%

Top-5 click share

19%

Top 20: 46%

Open market

56%

CityComfort15%
Undercover7%
kraftd7%
INSIGNIA6%
shelikes5%
LABEL APPAREL3%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -56.8% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 19.0×

Open Trend

Top onesies for men search terms

onesies for men107K/yr -53.4%0.3% conv.
mens onesies for adults99K/yr -66.6%0.4% conv.
mens onesie80K/yr -54.0%0.3% conv.
mens onesies51K/yr -57.2%0.2% conv.
animal onesies11K/yr -56.1%0.0% conv.
adult onesies for men15K/yr -46.8%0.3% conv.
onesie men22K/yr -61.9%0.3% conv.
kigurumi7K/yr -31.1%0.0% conv.
onesie for men11K/yr -46.8%0.1% conv.
men onesies for adults6K/yr -48.6%0.3% conv.

All search terms

Top onesies for men 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

Mens OneZee Snuggle Fleece Onesie 31B1480 Black L-XL

Undercover£20.364.4★1,137 rev

INSIGNIA Mens Fleece Hooded Onesie pyjamas Loungewear With Double Zip (UK Alpha M L Regular Regular Charcoal Smooth Fleece)

INSIGNIA£16.404.4★80 rev

kraftd Onesies for Men Fleece Pyjamas Men All in One Jumpsuit Loungewear Nightwear Hooded Onesie Black/Grey

kraftd£20.454.6★90 rev

Star Wars Onesie | Chewbacca Onesie for Men | Fleece Mens Onesies | Fluffy Pyjamas for Adults Brown Size X-Large

Star Wars£28.724.7★2,278 rev

South Park Onesie for Men Fleece Hooded Jumpsuit Cosy Loungewear Teems Warm Pyjamas Cartman Kenny Funny Gifts for Him (M Multi)

South Park£18.444.7★133 rev

Newest

by launch date

Formemory Silly Wearable Onesie for Adult Pajamas Funny Onesies Soft Pajamas for Movie Nights Family Fun Cozy Relaxing (UK Alpha L Regular Regular Purple)

Formemory£11.571 rev

2mo ago

Formemory Silly Wearable Onesie for Adult Pajamas Funny Onesies Soft Pajamas for Movie Nights Family Fun Cozy Relaxing (UK Alpha L Regular Regular Green)

Formemory£11.511 rev

2mo ago

Joyesplay Silly Wearable Onesie for Adults Womens Funny Hooded Onesie Goofy Plush Pajamas for Cozy Nights Relaxation Family Fun (UK Alpha L Regular Regular Purple)

Joyesplay£12.380 rev

3mo ago

YLLSOPHAN Adult Men Women Animal Pattern Hooded Pyjamas Sleeping Wear Onesie Soft Flannel Extra Thickness Loose Fit Halloween Party Costume (UK Alpha XXL Regular Regular Cow-Loose Fit)

YLLSOPHAN£16.146 rev

9mo ago

Mens Plain jumpsuit Adult Warm Hooded Fleece All-in-One Zip 1Onesie Mens Nightwear Loungewear Snuggle One Piece Pyjamas Long Sleeves Stitch Onesie Adult (UK Alpha XL Regular Regular Black)

CLUCO£14.0824 rev

1y ago

What buyers say about onesies for men

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

What buyers love

Warmth28%

“Feels soft, keeps you warm”

Size-Overall14%

“True to size”

Comfort-Overall13%

“Lovely and comfortable”

Quality-Overall7%

“Well made and come well packed and on time”

Value For Money7%

“Good value”

Soft Feel6%

“The fabric feels super soft and comfy, perfect for lounging around in”

Advertised Vs Actual Product4%

“As expected”

Material Quality2%

“the fluffy material makes it a comfortable winter piece”

Gifting Purpose2%

“Was a present for my son”

Washability1%

“and washes well”

What buyers complain about

Size-Overall25%

“Terrible fit”

Quality-Overall10%

“not as good quality as the dark blue ones I bough back in March”

Stitch/Finish/Polish9%

“Stitching came away”

Value For Money8%

“And now the price has gone up so wont be reordering”

Durability6%

“Only had a couple of months and hardly used it and the zoo broke”

Thickness4%

“Thinner material then expected”

Zipper Quality2%

“the zip regularly gets stuck around the neck”

Thin2%

“Only issue is it's a little thin”

Machine Wash Suitability2%

“My main problem is getting him to take it off so I can wash it”

Color1%

“Grey onesie disappointment”

Top return reasons

Size-Overall63%

Gap/Hole5%

Length5%

Quality-Overall3%

Thigh Fit3%

Stitch/Finish/Polish3%

Material Quality3%

Zipper Quality3%

Arm Fit1%

Defective Material/Parts1%

Common questions

Is onesies for men profitable to sell on Amazon United Kingdom?: The niche generates £23K/yr across 118 tracked products. 0 of 26 products launched in the last 360 days are still selling. 90-day search growth is -56.8%. Flapen's verdict: Skip it (48/100).
How competitive is the onesies for men niche?: 49 brands and 56 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 41% of demand.
What do buyers complain about in onesies for men?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Stitch/Finish/Polish. The return rate is 3.4%.
When does demand for onesies for men peak?: Demand peaks in Oct–Nov–Dec; the busiest month runs 19.0× the quietest.
What does it cost to enter the onesies for men niche?: Listings span £7.39–£31.75; the average listing price is £18.69 (sweet spot $15–$100). The average incumbent carries 831 reviews — the moat a new listing must climb.