Paperlink Sum it Up 21 st Birthday Card Celebrate a landmark birthday with a friend or relative with this elegant and mathematically specific card that will remind them EXACTLY how old they are! Part of the Sum it Up collection from Paperlink, this lovely card features a textured cream background with the age displayed in a shimmering metallic gold font. The front of the card reads,  21 Years. You’ve officially been brilliant for, 252 -Months, or 1,092 -Weeks, or 7,665 -Days, or 183,960 -Hours, or 11,037,600 –Minutes The inside of the card reads ‘ Happy 21 st Birthday’  with plenty of space to add your own personal message. The card measures 16cm x 13.7cm and comes with a white envelope. Paperlink Paperlink is one of the greeting cards industry market leaders, specializing in contemporary and humorous cards. Founded in 1985, the Paperlink collection encompasses all occasions and the designs include beautiful imagery, funny cartoons and witty typography - a card for everyone!