Sized XL through 5XL, because most compression socks stop long before the people who need them do.
Standard socks are knitted for an average calf. Stretch one over a larger leg and the compression stops being graduated — it becomes a tight band that digs in, rolls down, and leaves a mark. That is not a comfort problem, it is a mechanical failure. Graduated compression only works if it fits.
These are knitted wider from the start, so the gradient holds across the whole calf.
20-30 mmHg
Firm graduated compression — the level used for visible varicose veins, swelling that has not gone down overnight, standing shifts and long flights.
Measure first
Measure the widest part of your calf in the morning, before swelling starts, and size from that rather than from your shoe size. Calf circumference is what decides fit here.
Before you buy
If you are diabetic, have peripheral arterial disease, or reduced feeling in your feet, speak to your doctor before wearing firm compression.