Help with watch size!

[mjvictamonte]

I'm looking to purchase a big oversized men's watch and came across this picture online. I found out the particular style in the picture comes in a 45mm or 50mm size. Anyone have an idea as to which of those two sizes is pictured below? TIA!

 

[chessmont]

Holy crap those are huge! It looks like the one with the white face at the bottom of pic is largets but that could be because the white face makes it look larger...

Actually, looking again, I just can't tell.

 

[Mr. Ho]

45mm i would consider big. 50mm I would consider oversized. Hard to tell which is which in that picture, but anything larger than 45mm is huge.