The higher the height of the boot, the harder they are to make. This is usually reflected in the price and taller boots are more expensive. Thigh high, high heel boots that are made with genuine leather uppers usually cost at least few hundred dollars. Boots usually come with buckles, laces, or zippers. Buckles allow one to adjust for a better fit.
Laces allow one to adjust to get the best fit, but take the longest to put on and take off.
Full laces on thigh high boots can take about 15 minutes to tie on. Zippers enable one to quickly put the boots on and take them off in seconds, but do not allow one to adjust the fit. Boots should always be looser inside than with pumps, but not too loose. This makes them easier to get into and take off. So, it is usually best to wear boots either barefoot or with heavy cotton socks.