The dimensions / thickness of the corners are as follows:Dimensions (External) Per Corner: 82x82x86cm Dimensions (Internal) Per Corner: 62x62x60cm Wall Thickness: 24mm. 420 x high quality EPS70 polystyrene corner edge protectors. These are ideal for protecting square or rectangular shaped items in transit. These are packed in sets of 4 corners as pictured, which Are Easy To Split. You require 8 corners (2 sets of 4) per package / item you are packing. The quality of these corners is excellent and they are suitable for most ceramic and delicate items. Note that you may also require additional forms of protection in the parcel, depending on what you are sending and how you are protecting it.