Clearly Whimsy Stamps Collection "A Very Mice Day" clear stamp set, designed by Crissy Armstrong for Whimsy Stamps. 

These adorable mice are busy with life’s little moments — whipping up something yummy, tidying up, curling up for a nap, and enjoying tasty treats. Full of charm and personality, this set is perfect for sending sweet thanks or brightening a friend’s day with a handmade smile.
High quality photopolymer clear stamps, use with an acrylic block Approximate size in inches: 4x6 polymer sheet.