Number 11 Envelope Size: Perfect for Letters, Documents, & Business Correspondence

The number 11 envelope size (4 1/2" x 10 3/8") is an excellent choice for both professional and personal correspondence. Its longer dimensions make it ideal for mailing letters, invoices, contracts, and other important documents. Whether you are sending business letters or personal communications, this envelope size provides a sleek and professional appearance.

Dimensions: 4-1/2" x 10-3/8", Max. Enclosure Size: 4-1/4" x 10-1/8"