Packnest’s Custom Large Letter Postal Box is the perfect solution for mailing documents and large letters safely and securely. Made from durable cardboard, these boxes are built to withstand shipping pressures while keeping your valuable contents protected.

With a spacious design, our large letter postal boxes wholesale in the UK can easily hold bulky documents, certificates, manuscripts, or personal letters and cards. Whether you’re a business sending important contracts or a family mailing heartfelt messages, Packnest’s black letter boxes ensure everything arrives intact.

The strong construction of our large letter boxes and records mailer boxes provides peace of mind during transit, shielding items from damage or bending. Their sleek, efficient design also supports smooth postal handling—minimizing delays or delivery issues.

Easy to assemble, our shipping mail postal boxes feature pre-scored folds for quick setup. Simply insert your items, seal with tape, and your package is ready to go. Lightweight yet robust, they help reduce postage costs while guaranteeing maximum protection.