I know there are variations from manufacture to manufacture but is this extreme? I'm sure tire pressure will change the size.
Sold a person a set of Titan Tru-Power 23 X 10.50-12 tires and this is the response I received:
"Although the tires you sent me say the correct size they are an inch and a half smaller!!!!! Did they come from a tire factory malfunction? I even checked with the local tire stores that sell these tires. If you want pictures I'll send them".