Is overnight diapers size 5 profitable to sell on Amazon United States?

The niche generates $1.7M/yr across 26 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -2.4%. Flapen's verdict: Worth a look (56/100).

How competitive is the overnight diapers size 5 niche?

8 brands and 50 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 97% of demand.

What do buyers complain about in overnight diapers size 5?

Top complaints mined from reviews: Leak-Proof, Smell, Value For Money. The return rate is 0.8%.

When does demand for overnight diapers size 5 peak?

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

What does it cost to enter the overnight diapers size 5 niche?

Listings span $9.86–$80.97; the average listing price is $34.62 (sweet spot $15–$100). The average incumbent carries 15,455 reviews — the moat a new listing must climb.

overnight diapers size 5

Worth a look

Shows searches that convert (14.9% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Conversion

Incredible14.9%

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

Returns

Incredible0.8%

return rate — above 5% kills the launch gate

Avg price

Incredible$34.62

avg listing price — sweet spot $15–$100

Market size

Great$1.7M

$1.7M/yr · 324K searches

Price range

Great$9.86–$80.97

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

Competition

Okay58%

top-5 click share — leaders hold, buyers still browse

Growth

Bad-2.4%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad15,455.08

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad97%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, overnight diapers size 5 is a $1.7M/yr Amazon United States market (324K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Aug. Verdict: Worth a look — 56/100.

Data updated Jul 20, 2026 · scored weekly · How we score niches

overnight diapers size 5 market data

Units sold / yr: 40K–50K; avg 2,000–2,500/product
Revenue / yr: $1.4M–$1.7M; units × avg price
Conversion rate: 14.9%
Avg BSR: #31
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 51 months
Avg seller age: 144 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 rising

Sellers

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

58%

Top 20: 94%

Open market

Pull-Ups43%
GoodNites42%
MooMoo Baby5%
Pampers4%
Ninjamas2%
FUVVRVAL1%
Open — no brand owns it (2 brands, 2%)

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — -2.4% search growth over the last 90 days.

Peak months: Aug · busiest ÷ quietest = 1.9×

Open Trend

Top overnight diapers size 5 search terms

overnight diapers size 590K/yr -4.4%0.2% conv.
night diapers size 532K/yr -7.2%0.3% conv.
nighttime diapers size 526K/yr -7.9%0.2% conv.
goodnites xs27K/yr -7.8%16.0% conv.
overnight pull ups 4t-5t23K/yr -2.1%16.8% conv.
size 5 overnight diapers19K/yr +1.5%0.3% conv.
night time diapers size 518K/yr +12.1%0.1% conv.
nighttime pull ups 4t-5t10K/yr +23.1%13.6% conv.
overnight pull ups 2t-3t12K/yr +8.1%10.7% conv.
size 5 nighttime diapers10K/yr +13.7%0.1% conv.

All search terms

Top overnight diapers size 5 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

Goodnites Boys Nighttime Bedwetting Underwear Size Extra Small (28-43 lbs) 44 Ct (2 Packs of 22) Packaging May Vary

GoodNites$28.404.8★28,354 rev

Pull-Ups Boys Night-Time Potty Training Pants Size 4T-5T Overnight Training Underwear (38-50 lbs) 52 Ct

Pull-Ups$28.024.7★11,204 rev

Pull-Ups Girls Night-Time Potty Training Pants Size 4T-5T Overnight Training Underwear (38-50 lbs) 52 Ct

Pull-Ups$28.094.7★7,937 rev

Goodnites Girls Nighttime Bedwetting Underwear Size Extra Small (28-43 lbs) 44 Ct (2 Packs of 22) Packaging May Vary

GoodNites$28.544.8★17,416 rev

Goodnites Nighttime Bedwetting Underwear Boys XS (28-43 lb.) 99 Ct (3 Packs of 33) Packaging May Vary

GoodNites$59.414.8★28,354 rev

Newest

by launch date

Upairy Potty Training Pants Cotton Absorbent Training Underwear for Toddler Boy and Girls 2T-5T Soft Absorbent & Leak-Proof with Characters(4PCS S)

YIKG$23.982 rev

3mo ago

Pull-Ups Boys Night-Time Potty Training Pants Size 4T-5T Overnight Training Underwear (38-50 lbs) 92 Ct

Pull-Ups$48.6511,204 rev

8mo ago

Pull-Ups Girls Night-Time Potty Training Pants Size 4T-5T Overnight Training Underwear (38-50 lbs) 92 Ct

Pull-Ups$48.477,937 rev

8mo ago

Boys Incontinence Underwear Leakproof Daily & Nighttime Bedwetting Briefs

FUVVRVAL$31.9568 rev

10mo ago

Pull-Ups Boys Night-Time Potty Training Pants Size 4T-5T Overnight Training Underwear (38-50 lbs) 52 Ct

Pull-Ups$28.0211,204 rev

2y ago

What buyers say about overnight diapers size 5

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

What buyers love

Leak-Proof18%

“No leaks”

Quality-Overall11%

“High Quality Premium Pull-up that you can Depend On”

Size-Overall11%

“they fit comfortably”

Sleep Quality7%

“Excellent product my grandbaby sleeps all night now”

Comfort-Overall6%

“Very comfy”

Design-Overall5%

“The design is cute”

Soft Feel4%

“softer material which seemed to be more comfortable”

Allergies3%

“Gentle and no irritation for kids”

Absorbency3%

“Very Absorbent”

Ease Of Use3%

“Easy to use”

What buyers complain about

Leak-Proof32%

“they leak”

Smell8%

“AWFUL SMELL”

Value For Money6%

“Its expensive”

Absorbency5%

“Not absorbent”

Advertised Vs Actual Product4%

“FALSE ADVERTISING”

Size-Overall3%

“fit narrow”

Allergies3%

“Diaper caused Rash”

Moist/Dry3%

“still wets during the night”

Adhesion/Stickiness2%

“also they are not as sticky as I would have hoped”

Sleep Quality2%

“Would not recommend for night time”

Top return reasons

Size-Overall70%

Leak-Proof6%

Advertised Vs Actual Product5%

Age Suitability3%

Absorbency3%

Value For Money3%

Smell2%

Functionality-Overall2%

Comfort-Overall1%

Material Quality1%

Common questions

Is overnight diapers size 5 profitable to sell on Amazon United States?: The niche generates $1.7M/yr across 26 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -2.4%. Flapen's verdict: Worth a look (56/100).
How competitive is the overnight diapers size 5 niche?: 8 brands and 50 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 97% of demand.
What do buyers complain about in overnight diapers size 5?: Top complaints mined from reviews: Leak-Proof, Smell, Value For Money. The return rate is 0.8%.
When does demand for overnight diapers size 5 peak?: Demand peaks in Aug; the busiest month runs 1.9× the quietest.
What does it cost to enter the overnight diapers size 5 niche?: Listings span $9.86–$80.97; the average listing price is $34.62 (sweet spot $15–$100). The average incumbent carries 15,455 reviews — the moat a new listing must climb.