The sizes in “inches” available for selection refers to the cake diameter. The height will depend on whether you select a Single Height (SH) or a Double Height (DH) cake.
SH - Stands for Single Height (1 tier cake, around 4" High)
DH - Stands for Double Height (2 tiers of the same size cake, around 7-8" High)
Notes:
The black buttercream part of this cake it is made out of chocolate buttercream flavour and also you got to understand it will stain easily so it should be handle with more care.