I actually purchased the black Cobbler Studded boots from Crocs website and loved them so much that I ordered the brown from Amazon because they ran out of my size.
First let me explain by saying the black boots I ordered was a size up and got a 7 because from previous reviews explained they were short on the toe if you buy true to size. Though it was slight roomy yet it was very comfortable to wear and nothing a thick sock couldn't fix.
So I wanted to be daring and purchased the brown in the size 6 which is my true size to compare the difference. OK...that was a big mistake. The reviews were correct. They were tight and was not comfortable at all. So I had to return them which was no hassle since its sold by Amazon so shipping was free. Can a girl try?!!
Just size up. And for those ladies with muscular calves like myself. These are perfect. Don't let the slip on with no zipper surprise you. Can where with skinnies, cords and thick leggings... won't be a problem. Will be able to pull off and on with ease. The extra 2" height is a plus. These are supper cute and will get compliments.