I bought two pairs of these in the small size after being diagnosed with pots and it was recommended I wear compression socks and garments to prevent blood pooling.
I’m also sensitive to heat as that is a trigger and the socks are lightweight enough for me to wear in the warmer weather.
Also tonight I am 57 kg 165 cm. My calf size is 34 cm yet the size chart put me in the M1 sizing.- the most appropriate size for me was The SMALL.
I tried these on first even though the size chart showed my foot size falling into the larger sizing. The Small is actually the perfect fit.. I’ll be returning the M1 sizes as I put them next to the small size after trying the small one and the M1 was too long for me.
Hopefully this helps someone else in the same boat:)
Have a great day! :)