Paper Accents Card & Envelope's are acid free, lignin free, buffered, and archival quality. The cards and envelopes are heavy cardstock. Decorate with rubber stamps, rub-ons, stickers and much more. What could be more fun then decorating and personalizing your cards and envelopes! 4.25"x 5.5" Textured Deep Black 12pc- 12 blank cards and 12 white envelopes.