I am usually a 41 in Euro sizes but went for the 42 based on past experiences with Swedish clog sizing. Second. She has a narrow foot, and these work great. I spent several full days walking in NYC with these sneakers without having painful feet at the end of the day! Ive tried Bose, Ive tried Sennheiser, I even tried the Jabra 65t that someone else mentioned in these reviews. Took away one star for effort it took to put together with no instructions. These Under Armour sandals do not come up in a regular search for sandals on Amazon. Looks good on All that being said, it is very important to know when ordering these clogs that they do run smaller than Dansko and slightly narrower. I did a lot of comparisons, on the best solution to mount my Thule ARB53 Aeroblades on my Touareg.