Clearly Whimsy Stamps Collection "Cappy Birthday" clear stamp set, designed by Krista Heij-Barber for Whimsy Stamps. 

Adorable capybaras ready to bring on the birthday cheer. Set includes 4 images and coordinating sentiments, perfect for sending happy birthday wishes. 
High quality photopolymer clear stamps, use with an acrylic block Approximate size in inches: 4x6 polymer sheet.