Pretty true to my street shoe size.
FootJoy actually do, or did, shoe fittings (cue a rash of abuse from the forum 🤣🤣); guy came along with a Brannock gauge, measured your feet and then gives you the measured size to try, in different sizes for each foot if necessary. Consequently I know that my correct size in FootJoy is 10.5 wide, and I would do 36 straight out of the box with no issue. I previously bought 11 medium and he said that I could get away with that if the price was right (I’d found a pair of Icons for £80, down from £200), but the difference is noticeable and they’d have to be giving them away for me to go to 11 medium now. I’d never go 11 medium in a FootJoy Boa shoe; there’s just a little bit of looseness that the Boa can’t take out.
If you’re down at Silvermere I think they’ve got a FootJoy gauge, might be worth getting checked.