2400 Pcs Peel and Self-Seal White Letter Mailing Envelopes Shipping 3-5/8” x 6-1/2” Product Specifications: —Size: 3-5/8” x 6-1/2” Inches (PLEASE CONFIRM SIZE BEFORE PURCHASE) —Peel & Seal Envelopes for quick and easy use Package Contents: 2400 – Letter envelopes (3-5/8” x 6-1/2” Inches).