I am usually a size 7; occasionally a 7.5. It does say size up if between sizes but I figured a 37 would work for this one since I have the Flume Heeled Sandal in size 37. This was too small for me - I couldnt slide my foot all the way in. My foot is a bit wide (3 7/8" at widest part when standing). So if you have narrower feet you might be able to go with your usual size but if you have wider feet I would suggest sizing up even if you arent usually (just occasionally) between sizes. There wasnt a lot of extra space in front of my toes so I am not sure if it would have fit even if I could have slid my foot all the way in.
It cost me $5 to exchange for a 38 (haven't exchanged yet).
Also, I couldnt tell from the pics if the studs are a light gold color or not. They are a warm silver color but I think they would go with gold jewelry etc. nicely since metallic is a neutral in my book!
Hope this helps because this shoe is super cute and the low heel is functional! I am envisioning a little flair for jeans and a t-shirt kind of days or a tropical vacation where heels are a bad idea on cobblestone streets (and take up too much room in the suitcase!).