Age is just a number; A shocking, baffling, and confusing number, that can't possibly be correct; Funny Birthday Card; 40th; 50th; 60th; 70th, 80th birthday; Aging Humor PRODUCT DETAILS: This is an A-2 card (4.25" x 5.5"), digitally printed on 100% recycled, 100 lb. luxurious cover stock. This card is blank inside, and it comes with a 100% recycled A-2 kraft envelope and wrapped in a clear plastic sleeve.