"I take a size six in women's and have been searching for tall boots that would fit my narrow calves (12 inch circumference). Finally it dawned on me to try girls' boots and these were perfect. The 4.5 fit great, just a little loose around the calves, but definitely wearable, and they were tall enough that they didn't look like I was wearing kids' boots (I'm only 5 1). I ordered the brown and am considering getting the black as well."