Size, not weight, is the key factor in shipping logistics

The Royal Mail, which currently prices shipping on weight, is petitioning to change its pricing to be based on size -- apparently, size is the most important determinant of the actual cost of shipping goods.
Royal Mail's pricing structure has been in place for decades, and was inherited from a time when mail was sorted by hand...

Mr Dales said some customers would experience price rises and other price cuts, but the vast majority -- 74% -- would be unaffected by the proposed changes.