These are so lovely. Each are one-of-a-kind animal-themed envelope die-cut in small lots for choice selection. Each envelope is then converted from vintage picture book pages, hand folded and glued in the studio. Includes fold-over note, envelope seal and address label. It is recommended to use hand canceling which is a way of validating your postage with a handheld rubber stamp thereby saving it from machine processing which can damage delicate envelopes and fine papers. It's a service you can only get at the Post Office.3.5" x 5" folded$6 per card.