Plain mailer cartons
Unprinted corrugated cartons can still be quoted. The photograph shows a printed mailer.

Custom mailer boxes for UK online shops. These are corrugated cartons for posting smaller orders, quoted to your size and print. Prices and board grades are not listed on this page.
A mailer box is a corrugated carton for posting a smaller order. The photograph shows a printed mailer, one open with tissue and a small product and one closed. That is presentation, not a board grade. It is not a bag. Flexible packs for clothing and small items are printed mailer bags. Heavier or larger outer cartons are corrugated shipping boxes. Line a gift or apparel order with custom tissue paper, and close the parcel with custom packing tape. Those are separate products.
Enter the length, width and depth of the assembled box, and say what you are posting. We do not publish a flute, a board grade, or a list of mailer sizes. Tell us the closure you need rather than assuming the flap style in the photograph is the only one.
Choose a bag when the product can travel in a flexible pack, and an outer shipper when the order is large or heavy. See ecommerce packaging for the wider dispatch setup, and keep this URL for the mailer carton.
Unprinted corrugated cartons can still be quoted. The photograph shows a printed mailer.
The same carton with your name or a design on the outside.
Tissue and tape can be quoted with the carton. They are not included unless you ask.