Size 12 US is a 42 EUR and fits like an 11 or 11 1/2. Wish I knew this beforehand. Otherwise, they are lovely!Velcro closure allows perfect fit. Soft and supportive for bed.I have worn Mephisto womens shoes/sandals for over 15 years and the superior quality has never changed! I wouldn't even consider wearing any other brand!They are the bestMephisto is one of the finest European walking shoes. The sizing is always consistent with excellent arch support. Workmanship is faultless and they last and last. Worth the price. It's hard to find anything in white after Spring and I was pleased to find this pair on Amazon in time for a river cruise from Budapest to Amsterdam in August. I can depend on these shoes to carry me down cobbled streets and up castle and cathedral stairs!!!What I love about these shoes is that they are comfortable from the moment you put them on.This sandals is very comfortableShoes are very confortable and look great.Très confortables et élégantes