This was an advertising premium book from Brooke Bond, Red Rose and Blue Ribbon Tea. Since the cards are pasted the print color of the backs are unknown. The cards and the pages have information about each North American wild flower that is included. The book measures 7-1/4'' x 4-1/2'' and each card measures 1-7/16'' x 2-11/16''. The book and cards are in excellent used condition. There is a name and Alton, New Hampshire stamped near the back of the book. There was an old sticker on the front cover over the 25c price as pictured.