When buying photo envelopes, your choice depends on whether you are pictures or storing them. Most shoppers prefer peel-and-seal options for convenience, while professional-grade mailers offer rigidity to prevent bending. Top-Rated Photo Envelopes Key Features Avg. Rating Office Depot Clean Seal 4"x6" Go to product viewer dialog for this item. Bulk mailing/sorting White, 24lb paper, extra-deep flap. JAM Paper Stay-Flat Mailers Go to product viewer dialog for this item. Shipping art/photos Heavyweight 130lb cardstock to prevent bending. Lineco Glassine Envelopes Go to product viewer dialog for this item. Archival storage Protects against fingerprints, dust, and grease. Key Purchasing Factors