Hi AMGF,
For shoes, in general we find Lotto to run true to size. You can always check out fit description for those. We have a few of the guys try on the shoes to determine the fit. It's the same with apparel. Lotto adjusts the sizing for the US market, so it fits mostly true to size. Some items are slimmer than others, though. I would suggest sticking with the Large in Lotto, but if you have a particular top you're interested, we're always happy to offer more specific feedback.
Thanks,
Tiffani, TW