Tri Shoe sizing

Hey all, just curious if anyone has any input on sizing for bike shoes. I’ve tried on a few different brands, but am looking at Pearl Izumi’s, unfortunately no LBS carries them. Yes I know best way is to try them on, but just curious anyone have experience with PI’s? I have used Louis Garneau’s for awhile and am in a 45 there. for Sidi’s I fit in a 44.5 for the T3, and for the specialized Trivent I’m in a 44. With all that said anyone give me a good rough estimate of what I would be in for a PI? Their size chart says 45, but wasn’t sure… Thanks for the help!

There are always people in the comments section who say size up or size down. I know my measurements, I follow the manufacturers size charts, I have always got a good fit.

Thanks sharkbait_au, I think I’ll shoot for your suggestion which would be a 45 from them, and if it doesn’t fit I guess I’ll send them back and be out shipping!