These are one of the most comfortable shoes ever. They are lightweight but have that great quality feel. Only worn to try on. Koi runs a little large. I wear a size 9.5 and sometimes can wear 10’s but these are definitely a true 10 unless you have wider feet you may be able to fit these fine if you are a 9.5. My ankles are on the small size so that’s why I unfortunately need to lets these go. The heel height is about 2-3 inches with a zipper in the back.