M Size: Suitable for EU 34 - EU 39.
-Length from Heel to the Top 28 cm, Varies 3-4 cm approx. 

S Size: See Picture Colour with Sizes stated

Each pair comes with anti-slip grip at the bottom to reduce slippery surface. 

Wearing sleeping socks can help to regulate lower core body temperature, which in turns may help a person get to sleep faster. 
Anti Slip / Non skid fuzzy Cozy Socks / Hospital Socks / Sleeping Socks

If you hate the thought of cold feet too, you should start wearing this while indoors to keep warm. 
Made with Light-weight material suitable for home use