21st Birthday Cards for Her
MaybeReturns run at only 0.1% of orders. But prices span $2.10–$11.62, mostly outside the sweet spot, so 21st Birthday Cards for Her is a Maybe.
- Flapen Score
- 54 / 100Top 18% of 835 Stationery & Office Supplies niches · +7 vs the category median of 4754
- Market size
- £140K/yr340K searches / yr
- 90-day growth
- -4.6%search demand this quarter
- Competition
- 38%top-5 click share · 35 brands · 67 sellers
Flapen Score
21st Birthday Cards for Her against its category
The dotted line is the Stationery & Office Supplies average. Past it, 21st Birthday Cards for Her is stronger. Inside it, weaker.
Market
The 21st Birthday Cards for Her market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for 21st Birthday Cards for Her 340K times last year and spent an estimated £140K. The top 5 brands take 43% of clicks. Flapen scores it 54 out of 100, a Maybe.
01 · Demand
9.6% of searches ended in a purchase last week.
Shoppers searched for this 340K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 9.6% of those searches ended in a purchase. Searches in the last 90 days moved -4.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated £140K a year.
- Searches, last 12 months
- 340K
- Growth, 90 days vs prior 90
- -4.6%
- Conversion, latest week
- 9.6%
- Market size, estimated
- £140Ka year
- Peak month
- January1.6× the quietest month
- Top search term
- 21st birthday card172K searches a year
02 · Price
A sale here is worth £4.29.
Listings sell for £4.29 on average, from £2.10 to £11.62. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 250 to 500 of them. At £4.29 that is £1K to £2K a year per listing.
- Average price
- £4.29under the $15 to $100 sweet spot
- Price range
- £2.10–£11.62
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 25K–30K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £1K–£2K
- Returns
- 0.1%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
80% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 4.5% of listings are out of stock. The average listing ranks #1,886 within Cards & Card Stock. It carries 373 reviews at 4.66 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 80%
- Prime listings
- 94%
- Out of stock, average day
- 4.5%
- Average rank
- #1,886in Cards & Card Stock
- Average rating
- 4.66 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 373per listing
- Listings tracked
- 49
04 · Newcomers
Amazon counts 0 of last year's 26 launches as successful.
26 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 26 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 26
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 26 months
Products
Top 21st Birthday Cards for Her products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 90-day click share
Belloxis 21st Birthday Gifts Grip Socks for Girls
- Price
- £5.67
- Rating
- 4.6/5
- Reviews
- 655
- Age
- 2y ago
UNMOT 21st Birthday Card for Her Happy 21st Card for Girl with Envelope
- Price
- £3.35
- Rating
- 4.5/5
- Reviews
- 127
- Age
- 1y ago
HOMANGA 21st Birthday Card 21st Birthday Gift for Men Women Vintage Back in 2005 Card with Envelope 21 Bday Card Decoration for Son Daughter Him Her 5×7 Inch
- Price
- £3.39
- Rating
- 4.6/5
- Reviews
- 54
- Age
- 11mo ago
21st Birthday Cards for Women Pink Glitter Balloons
- Price
- £3.36
- Rating
- 4.6/5
- Reviews
- 314
- Age
- 9mo ago
3D 21st Birthday Card with Red Heart Balloon for Her Daughter Sister Granddaughter | Happy 21st Birthday Gift Card for Women Blank Inside with Envelope (14x14 cm)
- Price
- £3.36
- Rating
- 4.5/5
- Reviews
- 83
- Age
- 8mo ago
Trending
90-day click momentum
21st Birthday Card for Men & Women 3D Pop Up Birthday Greeting Card Black & Gold 21 Years Old Birthday Decorations & Gifts for Him or Her Ideal for Son Daughter Sister and Special Cousin
- Price
- £6.10
- Rating
- 4.6/5
- Reviews
- 75
- Age
- 5mo ago
Me To You Tatty Teddy 21 Today Luxury Gold Embellished Birthday Card 6 X 9 Inches - Official Collection
- Price
- £2.10
- Rating
- 5.0/5
- Reviews
- 6
- Age
- 6mo ago
Belloxis 21st Birthday Gifts Grip Socks for Girls
- Price
- £5.67
- Rating
- 4.6/5
- Reviews
- 655
- Age
- 2y ago
21st Birthday Cards for Women Pink Glitter Balloons
- Price
- £3.36
- Rating
- 4.6/5
- Reviews
- 314
- Age
- 9mo ago
HOMANGA 21st Birthday Card 21st Birthday Gift for Men Women Vintage Back in 2005 Card with Envelope 21 Bday Card Decoration for Son Daughter Him Her 5×7 Inch
- Price
- £3.39
- Rating
- 4.6/5
- Reviews
- 54
- Age
- 11mo ago
Newest
by launch date21st Birthday Card for Men & Women 3D Pop Up Birthday Greeting Card Black & Gold 21 Years Old Birthday Decorations & Gifts for Him or Her Ideal for Son Daughter Sister and Special Cousin
- Price
- £6.10
- Rating
- 4.6/5
- Reviews
- 75
- Age
- 5mo ago
Me To You Tatty Teddy 21 Today Luxury Gold Embellished Birthday Card 6 X 9 Inches - Official Collection
- Price
- £2.10
- Rating
- 5.0/5
- Reviews
- 6
- Age
- 6mo ago
3D 21st Birthday Card with Red Heart Balloon for Her Daughter Sister Granddaughter | Happy 21st Birthday Gift Card for Women Blank Inside with Envelope (14x14 cm)
- Price
- £3.36
- Rating
- 4.5/5
- Reviews
- 83
- Age
- 8mo ago
YianHien 21st Birthday Card 3D Box Pop Up Birthday Card for Her
- Price
- £5.77
- Rating
- 4.7/5
- Reviews
- 231
- Age
- 9mo ago
Hierein 21st Birthday Card Pink 3D Pop Up 21st Birthday Cards for Her
- Price
- £5.85
- Rating
- 4.6/5
- Reviews
- 137
- Age
- 9mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take only 38% of clicks. An open shelf where new products get seen.
Brands
35 falling
Sellers
67
Top-5 brand share
43%
Top 20: 87%
Top-5 click share
38%
Top 20: 73%
Open market
50%
- Belloxis11%
- Stuff49%
- HOMANGA9%
- UNMOT8%
- Virelle7%
- Me To You7%
Demand
21st Birthday Cards for Her search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.6×
Search terms
Top 21st Birthday Cards for Her search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- 21st birthday card172K/yr
- 21st birthday cards for her57K/yr
- 21st birthday cards for him31K/yr
- 21st birthday card for her18K/yr
- 21st birthday card for him15K/yr
- 21 birthday card10K/yr
- 21st birthday cards9K/yr
- 21st birthday card male8K/yr
- happy 21st birthday card5K/yr
- 21st birthday card for men6K/yr
Reviews and returns
What reviews say buyers love and hate about 21st Birthday Cards for Her
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
great card so much bigger than expected ty
Very small
The beads are a bit smaller than I imagined
This card is fairly average in terms of quality and design
Really poor quality very disappointing
Rubbish
yes it's pricey
Sadly for what it was it was a very expensive card
Not worth the price
The envelope is too dark to write on
It was a little tricky to write on
the design is completely underwhelming
Love
Good quality card
Pleased to receive well made
Good quality
Excellent value for money
Good value
Also, very reasonably priced
Bright colours
Great colour
The labradorite has some beautiful colours when it catches the light
a good size
The adjustable size is perfect
it fits comfortably without being too tight
Lovely Design
Stars Design, with Blue foil
Beautiful birthday design
Return
0.1% Return rate 48% Fixable by listing
great card so much bigger than expected ty
Very small
The beads are a bit smaller than I imagined
This card is fairly average in terms of quality and design
Really poor quality very disappointing
Rubbish
it didnt work end up as nice as it looks on the pictures
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Birthday Cards for Women
£1.8M/yr-4.4%
Money Envelopes
£292K/yr-4.7%
Stamps
£2.8M/yr-17.4%
Classroom Essentials for Teachers
£33K/yr+185.3%
Academic Wall Planner 2025/2026
£52K/yr+109.5%
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 21st Birthday Cards for Her questions
Answered from the same tracked data.