We use our own cookies and those of third-parties in order to improve your experience.
You can read more information about our Cookie Policy
Select as many or as few of these as you'd like...
*I understand that I am signing up for marketing emails
Call us on 01622 580 100
Email us at [email protected]
My dimensions are in:
mmcminches
I'm looking for:
BoxesBagsPostal
My sizes are:
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.
Brown Large Letter Cardboard Envelopes are a packing room essential; perfect for securely sending a multitude of items through the post in a robust cardboard mailer. Our range of brown large letter cardboard envelopes include a variety of sizes of Amazon style MailJacket envelopes, as well as a range of market-leading ColomPac envelopes, including the CP 010, the strongest cardboard envelopes on the market. Whichever style you choose, we’re confident we’ll have a size for whatever you’re sending, all of our envelopes are super eco-friendly; recyclable, biodegradable, completely plastic free, and made from sustainable materials.
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.