very comfortable, i really recommend looking for your size by cm, for flats i take my exact cm and for heels i take it by 0.50 cm less.. use white paper and step on it, then mark the highest point for your toe and the lowest for your ankle, the measure how cm long is your feet, it should be perfect it worked for me, make sure you step on the paper not only measuring your feel cause when you step on it, it kinda widens a bit which is more accurate