We use cookies to improve your browsing experience. Read our Cookie Policy here. Continue
Subscribe to our newsletter for 10% off your first order, loyalty rewards and expert ecommerce advice. With over 2100 products in stock we are sure to have the right product for you.
Call us on 01622 580 100
Email us at [email protected]
My dimensions are:
I'm looking for:
My sizes are:
My dimensions are in:
mmcminchesmetres
BoxesBagsPostal
Minimum Size (My product is this big)Approx Size (Slightly smaller is ok)
Find Products
Or search by Royal Mail postal size:
You are at the 5+ Rate. Add 4 items to boost your savings.
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.
Thank you for your interest, this feature is coming soon.
