Party Supplies
bag it Plastics Cake Box 6 Inch Square Wedding Birthday Celebration Boxes 6" x 6" x 2.5" - Pack of 250
Supplied flat-packed, easy to assemble Ideal for small cakes / cake slices / cupcakes Suitable for food use - 350 micron Dimensions: 6" x 6" x 2.5" / 150mm x 150mm x 63mm (length x width x depth)
https://www.bizrate.co.uk/partysupplies/bag-it-plastics-cake-box-oid22049802391.html