Donna, that's why I'm uncertain which size to order. I'm a true euro 38 most of the time but sometimes get 38.5 in boots to accommodate socks etc. but my feet are very low volume so this can make them too baggy in the instep or too big in the ankle. So it really depends on whether they run small in length or width. I def need the length but maybe not the width unless they are narrow at the bunion area.
I always wear a 39 in Naots though... But I think their sizing is unique.
ETA: thanks, Beth! That's super helpful. I'm also a 38 so it sounds like I might not need to size up. 2.5" heel is right at my upper limit so it depends on how well balanced the rest of the sole is (my prob is ball of foot pain more than anything else). Is there any platform in front?