mermaid party decorations
Worth a lookShows no brand lock-in (top 5 brands take 31% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Brand share
Incredible31%top-5 brand share — no brand owns this niche
Returns
Great1.0%return rate — above 5% kills the launch gate
Competition
Great29%top-5 click share — an open shelf
Review moat
Good531.2avg incumbent reviews — the moat a new listing must climb
Conversion
Good5.3%search→purchase rate — share of searches ending in a sale
Growth
Good+26.3%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Bad£8.11avg listing price — sweet spot $15–$100
Market size
Bad£41K£41K/yr · 94K searches
Price range
Bad£3.26–£16.21cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, mermaid party decorations is a £41K/yr Amazon United Kingdom market (94K searches/yr). The top 5 brands hold 31% of demand. Demand peaks in Sep. Verdict: Worth a look — 57/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
mermaid party decorations market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- £24K–£32K
- units × avg price
- Conversion rate
- 5.3%
- Avg BSR
- #971
- Page quality
- 0%
- Prime
- 98%
- Sponsored
- 86%
- Out of stock
- 21.3%
- Avg brand age
- 24 months
- Avg seller age
- 198 days
Competition & brand share
Clicks spread well past the top 5 (29% combined) — an open shelf where new products get seen.Brands
57 rising
Sellers
65
Top-5 brand share
31%
Top 20: 75%
Top-5 click share
29%
Top 20: 69%
Open market
65%
- XJLANTTE7%
- Kaxulvoblig7%
- PTECDROTS6%
- XWCHASA6%
- OSDUE5%
- Adeyoo5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +26.3% search growth over the last 90 days.Peak months: Sep · busiest ÷ quietest = 2.4×
Top mermaid party decorations search terms
- mermaid party decorations38K/yr
- mermaid birthday decorations23K/yr
- mermaid party14K/yr
- mermaid decorations8K/yr
- mermaid party supplies4K/yr
- mermaid birthday4K/yr
- little mermaid party decorations3K/yr
- little mermaid party supplies1K/yr
Top mermaid party decorations 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Mermaid Party Tableware Set 10 Guests Mermaids Birthday Decorations Plates Table Cloth Banner Hanging Swirls etc Mermaid Party Supplies
Kaxulvoblig£12.535.0★1 rev
174PCS Mermaid Birthday Decorations Mermaid Birthday Banner Mermaid Balloons Tableware Tablecloth Cake Topper Hang Swirl Mermaid Tattoo Stickers for Girls Kids Little Mermaid Party Supplies
PTECDROTS£10.264.6★158 rev
Mermaid Birthday Decorations for Girls 106 Pcs Mermaid Party Decorations Kids with Table Cloth Paper Plates Cups Napkins Straws
XWCHASA£11.684.5★33 rev
175Pcs Mermaid Birthday Decorations - Balloons Party Plates Banner Cups Scale Tablecloth Cake Toppers for Girl Kids Little Ocean Party Supplies
XJLANTTE£12.204.5★124 rev
OSDUE Girls Jewelry Set 5 Pcs Mermaid Necklace Earring Bracelet Ring Set for Little Girl Princess Jewelry Party for Toddler Little Girl Play Party Favors Birthday Gift
OSDUE£3.784.5★757 rev
Newest
by launch date
Birthday Decorations for Girls Mermaid Party Decorations with Pastel Balloons Happy Birthday Banners Foil Balloons Cake Toppers Tiara and Fairy Wand Princess Party Supplies
TOLOYE£10.78389 rev
Adeyoo Mermaid Balloon Arch Kit Garland - 157Pcs Mermaid Balloons Arch Kit with Pastel Pink Purple Teal Blue White Latex Balloons Tail Seashell Foil balloon for Birthday Ocean Theme Party Decorations
Adeyoo£8.49100 rev
Mermaid Party Tableware Set 10 Guests Mermaids Birthday Decorations Plates Table Cloth Banner Hanging Swirls etc Mermaid Party Supplies
Kaxulvoblig£12.531 rev
Adeyoo Mermaid Balloons - 12Inch Mermaid Party Balloons Purple Pink Teal Balloon Glitter Metallic Purple Green Latex Balloon for Girls Mermaid Birthday Baby Shower Sea Theme Party Decorations
Adeyoo£6.49147 rev
Pink Blue Purple Balloons 60Pcs 12 Inch Pastel Balloon Set with Pearl Pink Blue Metallic Purple Balloons for Boys Girls Birthday Baby Shower Gender Reveal Wedding Mermaid Princess Party Decorations
DOOFE£4.93392 rev
Trending
90-day click momentumAdeyoo Mermaid Balloon Arch Kit Garland - 157Pcs Mermaid Balloons Arch Kit with Pastel Pink Purple Teal Blue White Latex Balloons Tail Seashell Foil balloon for Birthday Ocean Theme Party Decorations
Adeyoo£8.494.3★
Birthday Decorations for Girls Mermaid Party Decorations with Pastel Balloons Happy Birthday Banners Foil Balloons Cake Toppers Tiara and Fairy Wand Princess Party Supplies
TOLOYE£10.784.3★
OSDUE Girls Jewelry Set 5 Pcs Mermaid Necklace Earring Bracelet Ring Set for Little Girl Princess Jewelry Party for Toddler Little Girl Play Party Favors Birthday Gift
OSDUE£3.784.5★
Mermaid Birthday Decorations for Girls 106 Pcs Mermaid Party Decorations Kids with Table Cloth Paper Plates Cups Napkins Straws
XWCHASA£11.684.5★
Beliky Girl Body Glitter Gel 50ml Face Glitters Body Sequins Shimmer Liquid Eyeshadow Mermaid Sequins Liquid Holographic Glitter Gel Chunky Glitters for Eye Hair Nail DIY Art (White)
Beliky Girl£5.274.4★
What buyers say about mermaid party decorations
What buyers praise and complain about, mined from review topics.What buyers love
“Great quality, so easy to put up”
“Long lasting, super sparkly”
“Absolutely great product for the price”
“Very durable”
“the colours are vibrant”
“Does what it says”
“Great cake decorations”
“Really pretty decorations”
“Ideal for birthday cakes”
“As described and really easy to put on”
What buyers complain about
“Poor quality”
“Larger than I expected”
“Cheap material”
“The foil balloons kept deflating”
“Watery and doesnt look like the image”
“The image gives a false impression of what one will receive”
“only cons the tablecloth is a bit thin”
“however the Happy Birthday topper stick was too delicate”
“broke within minutes so had to balance it on top of the cake instead”
“although a few bent quite easily”
Top return reasons
Common questions
- Is mermaid party decorations profitable to sell on Amazon United Kingdom?
- The niche generates £41K/yr across 66 tracked products. 0 of 16 products launched in the last 360 days are still selling. 90-day search growth is +26.3%. Flapen's verdict: Worth a look (57/100).
- How competitive is the mermaid party decorations niche?
- 57 brands and 65 sellers compete. The top 5 products take 29% of clicks and top 5 brands hold 31% of demand.
- What do buyers complain about in mermaid party decorations?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Material Quality. The return rate is 1.0%.
- When does demand for mermaid party decorations peak?
- Demand peaks in Sep; the busiest month runs 2.4× the quietest.
- What does it cost to enter the mermaid party decorations niche?
- Listings span £3.26–£16.21; the average listing price is £8.11 (sweet spot $15–$100). The average incumbent carries 531 reviews — the moat a new listing must climb.