ITA with the ladies, OP - i have 3 pairs. 2 are my TTS in CLs, which is half a size up from my US size (i suffer the same predicament as duke with long toes). the
3rd one is a 37.5 but the insole measures the same as the 38s.
i wouldn't recommend going a half size smaller, but would keep the ones that fit right out of the box. they do stretch but not so much that you have to go down half a size. HTH!