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Twenty-One

Know someone who is finally becoming mature? (or at least think they are?) maybe it’s just someone’s 21st Birthday?

A 21st Birthday is the best time for a massive party and probably the biggest milestone for partying. So why not celebrate with one of our amazing milestone birthday cards? We have a lovely range to choose from with many different styles. We have brilliant humour cards, Unique and contemporary to help celebrate this birthday!

Enjoy having a scroll through our 21st milestone birthday cards... Remember if these aren't enough, then head over to Birthday Cards for wide selection of all ages cards.

21st Direction of Your Dre - Contemporary 21st Birthday Card 21st Direction of Your Dre - Contemporary 21st Birthday Card
£2.75
1 in stock
Contemporary Milestone Age Card. Lyric Occasion greeting cards are printed on a premium uncoated matt board using special and metallic inks and are greeted inside. Lyric Occasion greeting cards come individually cello-wrapped with a charcoal grey envelope. Text inside reads Happy 21st Birthday.
21 Today! Get a Job And Get Out - Humorous 21st Birthday Card 21 Today! Get a Job And Get Out - Humorous 21st Birthday Card
£2.85
9 in stock
Say it like it is - with this hilarious 21st Birthday Milestone card Inside - Blank inside for your own personal message Envelope - Plain White Envelope Size - 145mm Sqaure Card Type - FSC mix from responsible sources Publisher - Buddy Fernandez.
Age 21 Kapow Shakies Card - 21st Birthday Card Age 21 Kapow Shakies Card - 21st Birthday Card
£3.45
4 in stock
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Nicola Watson. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank i…
21 Years And 9 Months Ago - Humorous Milestone Birthday Card 21 Years And 9 Months Ago - Humorous Milestone Birthday Card new
£2.85
£1.99
SUPPLIER OF THE MONTH
6 in stock
This funny milestone birthday card is pretty straight to the point and self-explanatory! Inside - Blank for your own personal message Envelope - Beautiful Sunset Orange Envelope & Cello wrapped Size - 105 x 150mm Card Type - Premium Quality 350 GSM Card Publisher - Cardshit (pronounced Cards-Hit, of course)
21st Old and Wise - Contemporary 21st Birthday Card 21st Old and Wise - Contemporary 21st Birthday Card
£2.75
7 in stock
Contemporary Milestone Age Card. Lyric Occasion greeting cards are printed on a premium uncoated matt board using special and metallic inks and are greeted inside. Lyric Occasion greeting cards come individually cello-wrapped with a charcoal grey envelope. Text inside reads Happy 21st Birthday.
Still Look 21 - Humorous Greeting Card Still Look 21 - Humorous Greeting Card
£2.75
15 in stock
Funny puns, Hilarious images, Brilliant Milestone Birthday cards Inside - Blank inside for your own personal message. Envelope - Kingfisher Blue Size 105 x 150mm Card type - 300gsm Board Publisher - Quite Good Cards
Twenty-One (Scrabble) - Unique 21st Birthday Greeting Card Twenty-One (Scrabble) - Unique 21st Birthday Greeting Card
£3.25
3 in stock
These cards are beautifully put together with a wooden scrabble like piece at the start of every title on their cards. This really adds a strong touch of detail and a high quality feel. Inside - Blank for your own personal message Evelope - Kraft High Quality envelope Size - 155mm Square Card Type - High quality Board Publisher - Bexy Boo
Age 21 - Handmade 60th Birthday Card by Forever Cards Age 21 - Handmade 60th Birthday Card by Forever Cards
£3.75
1 in stock
Edge by Ge Feng.  These 5”x7” laser-cut cards with white envelopes are delightful, with the laser cut front throwing a shadow on teh inside of the card which looks stunning and can't really be see properly in a photograph.  Inside should be left completely blank to allow the effect to be fully visible, however there is room to write your own message on the back of the card within a 'message' box.
Herd You're 21Today - Humorous 21st Birthday Card Herd You're 21Today - Humorous 21st Birthday Card
£2.75
6 in stock
This humorous 21st birthday card is from The Art File. Sized at 120 x 170mm, the card has an embossed cow design onto a lovely brown board. This card comes with a white envelope and is blank inside for your own personal message.
21st Birthday - Unique Birthday Card from the Shakies Range by James Ellis Cards 21st Birthday - Unique Birthday Card from the Shakies Range by James Ellis Cards
£3.45
7 in stock
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Claire Shorrock. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank…
21 (Bright Lights Range) - Contemporary 21st Birthday Cards 21 (Bright Lights Range) - Contemporary 21st Birthday Cards
£2.75
8 in stock
The cards are brightly coloured hence the range name of "The Bright Lights" Inside – Blank for your own personal message Envelope – High quality plain white Size – 140mm Square Card Type – FSC mix from responsible sources Publisher - Redback Cards
Time To Party (Geronimo Range) - Large Format 21st Birthday Card Time To Party (Geronimo Range) - Large Format 21st Birthday Card
£3.25
6 in stock
This card has a bold floral designs combined with cold foils and embossed lines to give it a great premium feel - its big too at 190 x 164mm. Comes with white envelope and is blank inside for your own words.
It's The Big 21 Let's Party It's The Big 21 Let's Party
£2.75
3 in stock
This stunning 21st birthday card is from 'The Big One' range at The Art File. Sized at 120 x 170mm, the card has an embossed 21 in the middle of a lovely high quality design onto a classic white board. This card comes with a white envelope and is blank inside for your own personal message.
Age 21 Kapow Shakie - 21st Birthday Card Age 21 Kapow Shakie - 21st Birthday Card
£3.45
9 in stock
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Claire Shorrock. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank…
21 Today! (Leading Lady Range) - Large Format 21st Birthday Card 21 Today! (Leading Lady Range) - Large Format 21st Birthday Card
£3.25
4 in stock
This card has a bold floral designs combined with cold foils and embossed lines to give it a great premium feel - its big too! Inside - Blank for your own personal message Envelope - White  envelope Size - 190 x 164mm Card Type - Great quality cream (280gsm) textured. Publisher - The Art File 

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Contemporary Milestone Age Card. Lyric Occasion greeting cards are printed on a premium uncoated matt board using special and metallic inks and are greeted inside. Lyric Occasion greeting cards come individually cello-wrapped with a charcoal grey envelope. Text inside reads Happy 21st Birthday.
Say it like it is - with this hilarious 21st Birthday Milestone card Inside - Blank inside for your own personal message Envelope - Plain White Envelope Size - 145mm Sqaure Card Type - FSC mix from responsible sources Publisher - Buddy Fernandez.
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Nicola Watson. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank i…
This funny milestone birthday card is pretty straight to the point and self-explanatory! Inside - Blank for your own personal message Envelope - Beautiful Sunset Orange Envelope & Cello wrapped Size - 105 x 150mm Card Type - Premium Quality 350 GSM Card Publisher - Cardshit (pronounced Cards-Hit, of course)
Contemporary Milestone Age Card. Lyric Occasion greeting cards are printed on a premium uncoated matt board using special and metallic inks and are greeted inside. Lyric Occasion greeting cards come individually cello-wrapped with a charcoal grey envelope. Text inside reads Happy 21st Birthday.
Funny puns, Hilarious images, Brilliant Milestone Birthday cards Inside - Blank inside for your own personal message. Envelope - Kingfisher Blue Size 105 x 150mm Card type - 300gsm Board Publisher - Quite Good Cards
These cards are beautifully put together with a wooden scrabble like piece at the start of every title on their cards. This really adds a strong touch of detail and a high quality feel. Inside - Blank for your own personal message Evelope - Kraft High Quality envelope Size - 155mm Square Card Type - High quality Board Publisher - Bexy Boo
Edge by Ge Feng.  These 5”x7” laser-cut cards with white envelopes are delightful, with the laser cut front throwing a shadow on teh inside of the card which looks stunning and can't really be see properly in a photograph.  Inside should be left completely blank to allow the effect to be fully visible, however there is room to write your own message on the back of the card within a 'message' box.
This humorous 21st birthday card is from The Art File. Sized at 120 x 170mm, the card has an embossed cow design onto a lovely brown board. This card comes with a white envelope and is blank inside for your own personal message.
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Claire Shorrock. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank…
The cards are brightly coloured hence the range name of "The Bright Lights" Inside – Blank for your own personal message Envelope – High quality plain white Size – 140mm Square Card Type – FSC mix from responsible sources Publisher - Redback Cards
This card has a bold floral designs combined with cold foils and embossed lines to give it a great premium feel - its big too at 190 x 164mm. Comes with white envelope and is blank inside for your own words.
This stunning 21st birthday card is from 'The Big One' range at The Art File. Sized at 120 x 170mm, the card has an embossed 21 in the middle of a lovely high quality design onto a classic white board. This card comes with a white envelope and is blank inside for your own personal message.
This is the 21st Birthday - Unique Birthday Card from The Shakies Range A hand finished birthday card illustrated by Claire Shorrock. The picture is placed in a clear bag which is filled with loose glitter stars and ‘dot’ confetti. This is then placed behind a square frame on the front of the card, giving a smart finish with glitter that you can shake around. From The shakies range. Inside - Blank…
This card has a bold floral designs combined with cold foils and embossed lines to give it a great premium feel - its big too! Inside - Blank for your own personal message Envelope - White  envelope Size - 190 x 164mm Card Type - Great quality cream (280gsm) textured. Publisher - The Art File