a - girth of the foot
b - girth of the narrowest part of the lower leg above the ankle
b1 - girth 10 cm above the ankle
c - lower leg girth
d - girth under the knee
e - girth above the knee
f - mid-thigh girth
g - thigh girth (5 cm below the crotch)
h - hip girth
t - waist girth
A-D - knee-high socks
A-G - stockings
A - T - tights