Blank inside. 100lb heavyweight card stock. Offset printed. 4.25 x 5.5 inches. Illustrated by Jon Klassen. Printed by Red Cap Cards in Los Angeles, California, USA, on recycled paper. Available as both single cards and pre-packaged boxed cards. - Each single card comes with an envelope and a cellophane sleeve. - Boxed sets are 8 cards with envelopes and are to be sold as packaged, NOT TO BE re-sold as individual cards.