I ordered 3 of these for the summer. I am a size 9.5, but I ordered size 9, which is perfect for me. The shoes are very pretty and stylish, not at all "Clunky"-looking. I have not worn them long enough to comment about their toning features, but they are comfortable and attractive. I believe that I will buy a pair in each color.

uPDATE- i HAVE WORN THESE CONSTANTLY. THEY ARE WONDERFULLY COMFORTABLE, i HAVE EXPERIENCED ABSOLUTELY NO PAIN FROM THE WEARING OF THESE SHOES. i HAVE JUST ORDERED 2 MORE PAIR, INSTEAD OF REGULAR FLIP=FLOPS, THESE WILL BE MY SHOES FOR THE SUMMER OF 2011.

Update II  - Now I have 5 pair of these, they are wonderful, very fashionable, well-made and extremely comfortable. I have never suffered the tiniest bit of pain from wearing these, they help my feet to feel better during a long, hot day. I wear them with my nice sun dresses and they are always an elegant addition to my wardrobe. I will now order 2 more pair of the Toners in a slightly different style in order to have access to more colors. These are Great!