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Large Letter Board Backed Envelopes are perfect for keeping postal costs low whilst ensuring your documents are kept flat and don’t bend whilst in the mail. These board backed envelopes are sized to comply with Royal Mail Large Letter sizing, and combine a rigid 1000 micron backing board with a strong 120gsm paper front to give your documents the protection they need, whilst keeping weight low and ensuring you pay the minimum for posting. Available in a range of sizes, colours, and available with and without printing, these large letter Do Not Bend envelopes are perfect for a large range of items. Supplied in boxes for easy handling.
Please note: Large Letter sizing is up to 353 x 250 x 25mm with a 750g weight limit.