5 by 7 inch card featuring a bunch of different ferns (and a few insect friends) saying "I'm Rather Frond of You"

 The card is a thick, matte 100lb paper (thicker than cardstock) made from FSC certified, 100% recycled post-consumer waste. The envelope is made from 100% recycled material. It is protected by a compostable "plastic" sleeve made from PLA (that's plant based!).