Finding the right size
So I'm 5'2" with a 27" inseam and I'm guessing I need like a 44 or 46cm road bike because all the charts on the bikes I'm looking at say a 44 or 46 for my height but doesn't take into consideration my inseam. I can't find any bikes that size in the USA anywhere so I've been looking on aliexpress and alibaba to get some from china and they have them all over the place there but all their bikes say my height needs a 44cm which seems like it would be small cause when I was looking at bikes in the USA like diamonback and Trek and stuff I was thinking I needed like a 48cm so if I order one of those bikes from china how do I know I'm getting the right one? Do I just need to know the standover height of the bikes and then I can tell where the bar will be between my legs?