You're looking at zazzle.co.uk's surprise birthday invitation page, where you can find a fantastic range of surprise birthday invites, ready for customisation or to buy just as they are. Make your order special by customising your surprise birthday 14 cm x 19.1 cm invite with your own unique designs, pictures and text. Choose from five premium paper options and print both sides in full colour. Every card comes with an envelope. To see some of the other products available on zazzle.co.uk, check out our main surprise birthday page. No minimum order size and most invites are made within 24 hours.