square letterbox friendly boxes
Take a look at our range of Square Royal Mail Large Letter Friendly boxes, perfect to fit the letterbox limit for cost-effective posting in style!
These boxes are perfect for charm bracelets, bangles or smaller items. These boxes are multi-purpose so you can be inventive!
Please note that all of our gift box dimensions on our website are ‘internal’ measurements.
We recommend that you order a sample box so you can check that the overall external dimensions of your box and the mailer meet the Royal Mail size guidelines.
Square Letterbox Boxes