Tree-Free Greetings ECOnotes Notecard Set, 4 x 6 Inches, 12-Count Notecards with Envelopes, Rock Lobster (66538) 12-count 4 x 6 inch notecards with color-coordinated envelopes Vibrantly printed inside and out on 100 percent post-consumer recycled paper Paper made with wind power, processed chlorine free, green-E certified Sustainableand made in the USA Original design by The Duck Company