Long Card Happy Birthday Ballerina Red, Yellow And Blue - Cambridge ImprintBallerina, Lion and Acrobat Birthday Card. Cambridge Imprint cards are of 300gsm smooth ivory uncoated stock printed in hand mixed colours. On the reverse of the card there is the Cambridge Imprint mark and no other fussy labelling. Unless indicated otherwise, all cards are blank inside. This card measures 210 mm wide x 105 mm tall. Each card is supplied individually wrapped with a cream diamond flap envelope. Like all our paper products, our cards