STURDY CLASP & GUMMED CLOSURE - Ensures secure sealing of mailing envelopes, protecting your documents during transit, and maintaining a professional appearance for office or business mailing needs. LARGE PRESENTATION SPACE - The 10"L x 13"H size (catalog envelope #13) offers ample room for documents, photographs, or promotional materials, making it ideal for bulk mailing or presentation purposes. BRIGHT WHITE PAPER - Enhances clarity for labeling and handwriting, providing a clean, sharp background to ensure your mailing information remains easily legible and professional. ECONOMICAL BULK PACK - Comes with 100 durable envelopes per box, making it a cost-effective solution for organizations that require reliable mailing supplies without sacrificing quality. REUSABLE & LONG-LASTING - Crafted for multiple uses, these strong office envelopes are designed to withstand repeated handling, offering a sustainable option for ongoing mailing needs. Staples Clasp & Gummed Catalog Envelopes are an ideal solution for secure and professional mailing of documents, whether for personal or business use. Made from bright white paper, these large envelopes provide a clean and crisp surface perfect for labeling and writing, ensuring clear communication. With dimensions of 10 inches by 13 inches, they are classified as size #13 office envelopes, offering ample space for various types of documents.