10 x 15 Booklet Envelopes - 28lb. Bright White (1000 Qty.) | Perfect for Tax Season, Sending Catalogs, Pamphlets, Brochures and so much More! | Printable | 44410-1M Size: 10 x 15 Booklet Envelopes / 10 in. x 15 in. / 10" x 15" / 254mm x 381mm Color: 28lb. Bright White - Same bright look as our other Bright Whites, with a little more heft than standard 24 lb., for an added sense of quality, and strength. Quantity: Pack of 50 USES: Great for Archiving Documents as well as Professional way to send Pamphlets, Brochures, Sales Literature, Booklets, Annual Reports, Magazines, Catalogs and More! EVENTS: Professional Functions, Conferences, Conventions, Business Meetings and so much more! Printable on off-set and digital printing presses and some home printers.