Is mermaid party bags profitable to sell on Amazon United Kingdom?

The niche generates £19K/yr across 39 tracked products. 0 of 11 products launched in the last 360 days are still selling. 90-day search growth is +7.1%. Flapen's verdict: Worth a look (52/100).

How competitive is the mermaid party bags niche?

37 brands and 45 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 40% of demand.

What do buyers complain about in mermaid party bags?

Top complaints mined from reviews: Size-Overall, Strength, Advertised Vs Actual Product. The return rate is 0.7%.

When does demand for mermaid party bags peak?

Demand peaks in Jan–Sep; the busiest month runs 2.4× the quietest.

What does it cost to enter the mermaid party bags niche?

Listings span £2.85–£18.22; the average listing price is £8.01 (sweet spot $15–$100). The average incumbent carries 154 reviews — the moat a new listing must climb.

mermaid party bags

Worth a look

Shows low returns (0.7%), but a small market ($19K/yr) keeps it on the watch list.

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Brand share

Incredible40%

top-5 brand share — no brand owns this niche

Review moat

Great154

avg incumbent reviews — the moat a new listing must climb

Competition

Great39%

top-5 click share — an open shelf

Conversion

Good4.8%

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

Growth

Okay+7.1%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Avg price

Bad£8.01

avg listing price — sweet spot $15–$100

Price range

Bad£2.85–£18.22

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

Market size

Bad£19K

£19K/yr · 49K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, mermaid party bags is a £19K/yr Amazon United Kingdom market (49K searches/yr). The top 5 brands hold 40% of demand. Demand peaks in Jan–Sep. Verdict: Worth a look — 52/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

mermaid party bags market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: £16K–£20K; units × avg price
Conversion rate: 4.8%
Avg BSR: #1,074
Page quality: 0%
Prime: 97%
Sponsored: 90%
Out of stock: 22.2%
Avg brand age: 27 months
Avg seller age: 181 days

Competition & brand share

Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.

Brands

37 rising

Sellers

Top-5 brand share

40%

Top 20: 84%

Top-5 click share

39%

Top 20: 82%

Open market

56%

EETU11%
G.C10%
AMFUN7%
FACLJSSX6%
XJLANTTE6%
Matwsec4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +7.1% search growth over the last 90 days.

Peak months: Jan, Sep · busiest ÷ quietest = 2.4×

Open Trend

Top mermaid party bags search terms

mermaid party bags24K/yr -11.8%4.4% conv.
mermaid party bags fillers13K/yr +33.5%2.3% conv.
mermaid party bag fillers4K/yr +12.7%2.3% conv.
mermaid gift bag3K/yr +46.0%3.9% conv.
mermaid party favours3K/yr +27.9%0.5% conv.
mermaid party bag2K/yr +34.6%4.3% conv.

All search terms

Top mermaid party bags 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★)3 products 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

Mermaid Party Favours 84pcs Mermaid Theme Party Favors Set-Mermaid Loot Bags Hair Clips Stickers Slap Bracelets etc Mermaid Birthday Party Favors for Girls Mermaid Birthday Decorations Supplies

EETU£15.694.6★38 rev

G.C Mermaid Party Bags Fillers Girls Party Favours with Invisible Ink Pen Notebook Stamp Slap Bands Scratch Art for Kids Mermaid Pinata Party Supplies Pre Filled Party Bags for Kids Girl

G.C£16.214.7★90 rev

AMFUN 18PCS Mermaid Paper Party Bags Gift Paper Bags with Handles Snack Paper Gift Bags Candy Paper Bags for Childrens Birthday Party Ocean Themed Wedding Baby Shower-(21 * 15 * 8cm)

AMFUN£5.544.6★29 rev

FACLJSSX 84 PCS Mermaid Party Favor Mermaid Party Bags Gift Bags Tattoos Stickers Slap Bracelet Stickers Notebooks Pens Erasers for Birthday Mermaid Theme Party Gifts Bags

FACLJSSX£11.415.0★6 rev

20 Pcs Mermaid Goodie Bags - Mermaid Party Favor Bags with Tail Stickers Under The Sea Paper Gift Bags Scale Party Bags for Kids Girls Under The Sea Themed Little Mermaids Party Decorations

XJLANTTE£4.414.7★540 rev

Newest

by launch date

CIRDOTSH Mermaid Party Bag Suffers Favors Birthday Party Decorations Supplies Little Mermaid Goodie Bags Fillers for Birthday Gifts 12 Set

CIRDOTSH£12.050 rev

2mo ago

Glitter Mermaid Party Favor Bags Mermaid Party Goodie Bags Party Favor Box Under the Sea Party Bags

Thirty and Thirsty£8.340 rev

3mo ago

Mermaid Party Bag Fillers for Kids - 148PCS Party Favours with PE Bags Slap Bracelets Notebook Stickers Pencils Rings Give Away Girls for Pinata Fillers Birthday Toys Favours Class Rewards

Walkinbear£13.970 rev

6mo ago

Eurowrap Unicorn Medium Gift Bag Pink Present Bag with Rainbow Unicorn Cloud & Star Design Holographic Foil Finish & Ribbon Handles Birthday & Celebration Gift Packaging for Girls

Eurowrap£2.964 rev

7mo ago

50 Pcs Mermaid Goodie Bags Gift Bags for Christmas Party Favor Plastic Gifts Mermaid Tail Treat Bag with Handles for Girls Kids Birthday Party Supplies Baby Shower Return Gifts Thank You Gift Bag

Matwsec£4.393 rev

8mo ago

What buyers say about mermaid party bags

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

What buyers love

Quality-Overall28%

“Good quality”

Gifting Purpose11%

“Present Bag”

Value For Money11%

“Great price for party bag fillers”

Durability11%

“Pretty and long lasting”

Advertised Vs Actual Product11%

“Just what I needed”

Adhesion/Stickiness6%

“Easy to use sticks well”

Storage Capacity4%

“This provides a good stock of different things to put into the bag”

Pen/Pencil Quality4%

“The pens look nice”

Fun/Entertainment Experience4%

“keep everyone happy”

What buyers complain about

Size-Overall33%

“quite small”

Strength25%

“Too flimsy”

Advertised Vs Actual Product8%

“Title is misleading”

Quality-Overall8%

“Obviously these arent the best quality as these are never meant to be permanent toys”

Top return reasons

Size-Overall46%

Advertised Vs Actual Product15%

Quality-Overall10%

Strength8%

Material Quality6%

Compatibility-Overall4%

Functionality-Overall4%

Ease Of Use2%

Thickness2%

Wrinkles2%

Common questions

Is mermaid party bags profitable to sell on Amazon United Kingdom?: The niche generates £19K/yr across 39 tracked products. 0 of 11 products launched in the last 360 days are still selling. 90-day search growth is +7.1%. Flapen's verdict: Worth a look (52/100).
How competitive is the mermaid party bags niche?: 37 brands and 45 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 40% of demand.
What do buyers complain about in mermaid party bags?: Top complaints mined from reviews: Size-Overall, Strength, Advertised Vs Actual Product. The return rate is 0.7%.
When does demand for mermaid party bags peak?: Demand peaks in Jan–Sep; the busiest month runs 2.4× the quietest.
What does it cost to enter the mermaid party bags niche?: Listings span £2.85–£18.22; the average listing price is £8.01 (sweet spot $15–$100). The average incumbent carries 154 reviews — the moat a new listing must climb.