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" Black 10pc- 10 cards and 10 envelopes. Made in USA