From my limited experience, recent-season Ann footwear is true to size (though erring on the side of running large), while some older-season stuff ran at least a full size large. That's been my experience with a couple boots, a couple shoes and a couple sneakers. For direct comparison, I've got a pair of Ann boots from FW13(ish) where I wear a 40, but a pair of SS16 derbies were just barely large enough for me in a 41. (I'm a TTS 8/8.5 or EU 41)
It's been similar with their blazers and outerwear as well. I don't know if it's precisely the case, but the cutoff seems to be around when Ann left the label, with Ann-designed stuff running large and Meunier stuff running TTS to slightly large. I've seen substantial variance from piece to piece as well, though, especially with blazers, where I'd buy two blazers from the same season and one would fit me best in an S and one in an M. I'm sure there are plenty of people who can speak from far more experience than me, though.
Those Annchuck lows are the best white sneakers in the business. They look great out of the box, they look great beat to shit, they work with everything, and yet they're perfect with a whole lot of fits.
Thanks for this. I kind of suspected it might be along the lines of different now than past seasons, so that clears it up pretty well. Yeah, I agree. The Ann lows look amazing. I will eventually get both a black and white pair. For now, for the derbies I got from Yoox, I just got both sizes and I'll return the pair that doesn't fit.