Paper Accents Card & Envelope Sets are ready to personalize. Use stickers, rubber stamps, brads, eyelets, buttons, punches, and more. They are acid-free, lignin-free, buffered, and archival quality. 3.5"x 8.5" Slimline Smooth 100lb Solar White 10pc- Includes 10 cards made with 100lb cardstock and 10 matching envelopes. Envelopes are slightly larger than the cards; measuring approximately 4.13"x 9.5".