Boxes that the Royal Mail will allow to be sent as Large Letter parcels.
Royal Mail Large Letter Size:
A large letter sized parcel can be no larger than 353 x 250 x 25mm, and weigh no more than 750 grammes. Source: Royal Mail
Royal Mail Large Letter Size Boxes
Boxes that will fit in the post as “Large Letters”
We can also make boxes to your requirements! Our custom made packaging and printing section has everything you need.