Printed on a beautiful stock, occasion cards feature Felix's watercolor drawings, his handwritten font, and witty sayings that are positively charming. The quality envelope is the finishing touch. 4.25 x 5.5 inches folded. Ultra-premium, lightly-textured acid-free paper stock. Packaged in a cello sleeve. Front: h a p p y b I r t h d a y (with animal names). Inside: to ewe! (illustration of two ewes).