Buy packing boxes for mirrors, pictures & paintings
Triplast 305 x 229 x 102mm Medium Single Wall 12x9x4" Shipping Mailing Postal Cardboard Boxes (Pack of 25) : Amazon.co.uk: Stationery & Office Supplies
6" x 6" x 2.5" White Shipping Storage Boxes Cardboard Postal Gift Small Parcel (200) : Amazon.co.uk: Stationery & Office Supplies