6" x 9.5" Envelope Crystal Clear - Booklet Style, Auto-Insertable (5.5&Prime; x 8.5&Prime; Insert Size) - Box of 1,000 Clear mailing envelope made from USPS-approved polypropylene Tape-free opening for maximum auto-insertion and sealing compatibility Holds A5 (5.8 x 8.3) booklets, mini catalogs, flyers and leaflets Note that these particular envelopes do NOT have tape or seals in order to provide the optimum machine insertion capability. Made in the USA - manufactured in Marysville, OH