These are amazing! Perfect fit- I bought Big Kid 6, and I am a womens 8 wide. I have had many uggs, so comfortable, I had no issue getting them over my foot (sometimes the ultra minis can be a tight fit getting on). I live in FL, and love uggs, but they can be too hot- these ultra mini's are so far perfect for Florida winter weather (60-70 degrees) and without socks your feet are a perfect temp even if it gets up in the 70's during the day.I had to leave a review bx of the people who left reviews because their kid destroyed the toes. Teach your kid not to drag his/her feet. Kids do this- yes mine did too- don't get them uggs! and yes they will be destroyed in a week! Not the boot's fault at all. (BTW they make an ugg boot called the "ultimate short" that has extra rubber on the front if your kid drags her toes they hold up great for kids who are rough on regular uggs)If you are a woman who wants to save $- ugg "big kid" size 6 is same as a womens 8. Big Kid 5 s=womens 7. 4 same as womens 6. etc. Difference is they are usually a tiny bit shorter, and also wider. I need the extra width so always get kids sizes. Works the other way too. If your kid is a big kid size 3- womens 5 is same size, but narrower. Big Kid sizes run into mens sizes. Big Kid 6 is just before mens 7 and both big kids and mens are wider than womens. I am a womens 8, but have a wide foot- in womens sizes usually I have to get a 9 or 9.5 because of the width (and they are way too long)- but a mens 6 or big kid 6 (some brands stop kids sizes at 5) fit perfectly. Understand how sizes work, and in boots like uggs, you can get the kid sizes and save $ as kids are about $30 less, AND get the extra width if you need it. just make sure you are getting a "big kid" 6 NOT a toddler 6 etc). If your foot is narrow, don't do this as kids will be too wide, but for me they are perfect.