Sold as 12/Pack. Catalog envelopes are a reliable choice for multiple kinds of personal and business mailing purposes. Made from brown kraft paper that conceals contents from prying eyes. Dimensions: 9"L x 12"H, size #10. Gummed and clasp closures keeps your documents secured inside the envelope. Since this set includes 12 pieces per pack, you're guaranteed to have plenty of envelopes for all of your home or office mailing needs.