High-quality thigh high socks must have a wide band.
The narrow band cannot keep the socks on the thighs. The narrow band causes the thigh high socks to slide continuously, and they may even slip down below the knee in a short time. You have to use garters to fit them. The design of the Wide band will make the socks won't slip, without garter belts or constant adjustments.
Narrow bands may impair the blood circulation of thighs. When you have some muscles in your legs, they can easily cut into your thighs until cut off your circulation. This is a completely unqualified performance. The wide band is more friendly. They are like a lover's hug for the thighs. They are designed for complete comfort.
Narrow bands easily to lose the elasticity. They easily to lose their elasticity after a few washes, then can't stay on the thighs at all, and even hang down like the neckline of old T-shirts. The wide band is much better. The performance of high-quality thigh socks are not easily deformed, just like a new ones after washings.