White Booklet Envelopes, White Wove, 28 lb, Peel & Seal. Size: 10″ x 13″ – Qty 500 per box. 10″ x 13″, Booklet Envelopes, White Wove, 28 lb, No Window, Peel & Seal. When you can’t or shouldn’t fold the contents, here’s the professional way to send flat but bulky materials such as pamphlets, brochures, sales literature, booklets, annual reports, magazines, or catalogs.