Do you want this ozformers shirt?

[Towers_Spy]

Sizes are as follows (inches across chest)
Small 46-48
Medium 48-50
Large 50-52
X-Large 52-54
XX Large 54-56
XXX Large 56-58

Is that inches or centimetres across the chest 46 inches across the chest is, like, almost my armspan... or am I measuring wrong? One of my TF shirts from JayJays is 48cms across (not including sleeves) ??