The size is exact. I'm 6.5 and bought that size and the sneakers fit perfectly.I bought these sneakers because the concept of the desing is similar to Converse, but these ones are much better than Converse, for sure. The inside of the Guess ones are more comfortable, they doesn't have the color lines on the platform so it's a total white that will fit with more outfits. Additionaly, the details on the design make it unique without being scandalous.