These seemed impossibly tight when they arrived. I got a size 8 and am a true size 8.5 or 9 (likely an 8.5 on the left and 9 on the right as the right always takes more time to break in for me). I couldn't even get them on. I emailed saying I'd have to return, but tried the sock trick around the house. It worked! I wear them all the time now. They took 2 or 3 wears to break in but now they are so perfect.
I was weary sizing a whole shoe size down, but low and behold, following the instructions to wear/stretch the shoes, they fit like a glove. And the color/pattern is so unique and fun!