Turns out that the very outside edge of the insole is a bit raised and put some pressure on the outside edges of my feet that I didnt really notice until it was too late. They are definitely too small. -flawless Bluetooth even from across the house (two closed doors, 40 feet away and still pumping)***************UPDATE: 20/09/18****************So the Bluetooth connects flawlessly with my iPhone 6S, which was the first device I paired to it. The only thing that fixed it was hitting the “?” Button on the screen. Assembly is a snap- figuratively and literally so no tools required. So comfortable to wear. Both a virtually exactly the same shape. I am glad I am able to keep them The back of the slippers are not too high whereas you are not stepping on or over the back of the sole. I get so many compliments on them.