These cardboard hatboxes are easy to fold. Comes in sizes of; 33 cm, 40 cm, 57 cm and 60 cm. Measured from corner to corner. The depth of the boxes are; HB033 is approx 20cm, HB040 is approx 14cm, HB057 is approx 24cm, HB060 is approx 24cm. Please note that the 57 cm and 60 cm sizes can only be ordered upon request via email. We need to calculate the shipping costs for these first.