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)
Note: The colours of the cake will vary depending on the Character you Choose.