Rocket Note Cards (24 Non-foldover Cards and Envelopes) Space Note Cards (24 cards and envelopes) Premium 110# Classic Crest Cover Stock with Quality Matching Blank Bright White Envelopes This is a flat card, not a fold-over. Size is 6" x 4.25" Designed for writing little notes & thank you's on the front of the card. Looking for fold-over version, we have one, check out our full line.