BC JONG question - Dynafit Aero sizing

I'm looking at getting some Aero FR TL's to start living the dream and walking in the wilderness to get to lines. The problem is, I can't find anywhere to try these (or any other Dino-compatible) boots on. So I think I've got to do the innerweb purchase thing, which of course sucks for buying boots. I did some searching and have found some different sizing charts for the Dinos. It looks like a US men's 12 converts to roughly a size 30. Anybody have any Dynafit sizing advice for me?

what size boots\shoes do you wear

Im a mens size 10 in street shoes and a 27/27.5 shell in a dyanfit freeride aero.

Sorry, size 12.

if you wear a US12 size street shoe then youd be a 29 assuming the Mondo size 30 is a US12.
half shell sizes are the same

ie a 27 shell is identical to a 27.5 shell

Thanks for the help. Is the half size difference in the liner?

yes, the shells only come in full sizes.