I’ve always gone to Ataclete for my gear because everything was in one place that I need to train for AFSW.
Booties: good fit I bought the size 10. I went up in size as I am a barefoot shoe wearer, I wear vivobarefoots in a 7. For Belleville, mini-mil TR105 without steel toe caps size 9, and 10.5 with caps. The steel toe caps are standardized(the compressed toe setup or the common foot setup).
While the boot has a little more space in the toe area for me because I have a larger splay or foot spread than the normal shoe wearer, I end up have some extra water fill the toe area. Maintains fitting and stability well. Go with the suggested setup for sizing when you wear narrow toe shoes.
I bought the XL fins as well, I’d suggest the L fins unless you like the extra struggle when something isn’t perfect but still works.
I hope this helps someone figure their foot dimensions so you don’t have to spend so much money on footwear.