First of all, if thigh high socks can easily rise to thigh height, that means they must be long enough. This is not a simple concept in the category of thigh high socks, because for tall girls, the thigh height is more than 28 inches, so these socks should be at least 26 inches or higher. In fact in this category, only 10% of thigh high socks can meet this height, which is why it is hard for tall girls to find socks that are above the knee.
Secondly if thigh high socks can easily rise to thigh height, this means that the top of these socks are compatible with thighs that have muscles. The mid-thigh is much thicker than the knee, and the maximum width can be more than 12 inches, which is difficult to achieve with normal socks, but high quality thigh high socks are fully compatible with both standard and thick thigh widths, thanks to the fact that they are designed from the start for maximum width and do not rely solely on the elasticity of the sock to achieve this.
Elasticity is certainly an important part of thigh high socks, but not all problems can be solved by relying on the elasticity of the sock. For example, if the socks themselves are not high enough, but have very good elasticity, they can also be raised to mid-thigh height by stretching. This approach also has the obvious flaw that the socks are likely to retract quickly when stretched, and unless paired with a garter belt, these socks will quickly slide down to the knee and you will have to adjust their height frequently. The same is true for the width of the socks, if the base width of the thigh high socks is insufficient, then even if these socks are stretchy, when they are at thigh height they are likely to become so tight that they may leave deep indentations in the skin.
The best quality products in the category of thigh high socks are the ones that can easily rise above mid-thigh. Their base length is just long enough to reach thigh height, so they are not dependent on the stretched length and do not need to be paired with a garter belt. They are also wide enough at their maximum width to be compatible with thick thighs, so they are not too tight and do not cut into the skin. These thigh-high socks stay on your thighs in a very comfortable state, they don't slip, and you don't need to adjust their height from time to time. This is the reason why Kayhoma thigh high socks are so impressive.