Send a 21st Birthday Balloon In a Box


Looking for an eye-catching twenty-first birthday gift? Mark the occasion with our fantastic 21st birthday balloons. Available as a striking single balloon or as a beautiful balloon bouquet. Keep the traditional "Key Of The Door" Birthday going and surprise your youngster with this great fun gift. It's a winner!

18" Blue Holographic Happy 21st Birthday

£12.00

18" Blue Holographic Happy 21st Birthday Balloon in a Box

This Superb 18" Blue Holographic Happy 21st Birthday Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details
21 Glitter Birthday

£12.00

21 Glitter Birthday Balloon in a Box

This Superb 21 Glitter Birthday Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details
21st Birthday Supershape

£24.00

21st Birthday Supershape Balloon in a Box

This Superb 21st Birthday Supershape Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details
Radient Giant 21

£22.00

Radient Giant 21 Balloon in a Box

This Superb Radient Giant 21 Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details
21st Birthday Balloons Holographic

£27.00

21st Birthday Balloons Holographic Balloon in a Box

This Superb 21st Birthday Balloons Holographic Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details
Radient Giant 21

£22.00

Radient Giant 21 Balloon in a Box

This Superb Radient Giant 21 Balloon Gift will intrigue and thrill a lucky family member or friend! Expertly put together and blown up by our in house qualified balloon decorators!

Balloons Details

The next available delivery date is the 29th May 2019

About Us

Balloon in a Box has been sending out balloon delivery gifts for over 10 years, so it's fair to say we're experts at what we do. Rest assured that when you order with us, you're in good hands.

Please note that you can order a balloon up to a year in advance before the date you'd like us to send it

Contact Us

You can call us on 0845 486 2060 or, if you're calling from overseas, on +44 113 359 3144. Calls are charged at local rate.

Alternatively you can send an email to sales@ballooninabox.co.uk or submit an online enquiry by visiting our contact us page and we'll get back to you ASAP.

Opening Hours

We're open Monday to Friday - 9am to 5pm

Anything else we can do?

If there's anything else balloon related, that you can't find on this site, please give us a call and we'll sort it out for you. We can print balloons, supply you with helium, help you with party balloons and much more.