21st Birthday Cake Topper
A printable 21st birthday topper with the number already in place. Open it in the editor free, add a name, change the colours or the wording, and print it at exactly the size your cake needs.
Starts as21
Free to design, no account needed. Printing needs a CakeyTops membership — 7 days free, then £4.99 a month.
Lettering ideas
- Happy 21st
- 21 today
- Key of the door
- Cheers to 21
- 21 & fabulous
Keep the number big and put anything longer on a second, smaller line underneath — at cupcake size, one short line reads far better than two long ones.
What size to print
| For | Print at | Per A4 sheet |
|---|---|---|
| 6 inch cake | 5 in (127 mm) | 2 |
| 8 inch cake | 7.5 in (191 mm) | 1 |
| 10 inch cake | 7.5 in (191 mm) | 1 |
| Matching cupcakes | 2 in (51 mm) | 15 |
Other milestone birthdays
Frequently Asked Questions
What size should a 21st birthday cake topper be?
It depends on the cake: 5 in (127 mm) on a 6 inch cake, 7.5 in (191 mm) on a 8 inch cake, 7.5 in (191 mm) on a 10 inch cake. Matching cupcake toppers are 2 in (51 mm).
Can I add a name or change the colours?
Yes. The number and any lettering are editable text, so you can change the words, font and colour, add a second line, or swap in your own photo — the design stays print-ready at 300 DPI.
Is the 21st birthday topper free?
Designing it is free with no account. Downloading the watermark-free print file comes with a CakeyTops membership, and the first 7 days are free.