It must be the oldest pun in the world, but still a good one!
Hope they have an egg-cellant birthday. 
 
Designed and Printed in the UK on high quality, 280gsm uncoated card. Accompanied with a kraft brown envelope. 
All cards are blank inside, ready for your message.  
Size of card is A6 with a C6 envelope.
Some colours may vary from screen to print.