1. The toe trap that separates the big toe from the all the others is in the middle, not to the side, which kind of makes you entire foot not sit on the slipper correctly. My pinky toe definitely hangs off the slipper and there's a good amount of open space next to my big toe that could've been used!<br />2. The strap is tiiiiiiiiiiiight. Even without tabi socks on. I'm 6.5-7 US womens and I had slip as much of my foot on there as possible, then tap the tip of the slipper against the floor to get it the rest of the way on. Just ack!<br /><br />So I guess if you're gonna go for these, go a size up at the very least.I have tiny feet but even my heels were hanging over some! If the strap was better placed and a bit looser, I think my feet would fit just fine but yeah...some design problems. Probably going to return and look for a better pair  than try to go a size up, sadly. =(