C - Knee Height
D - Hip Height
C - Linear Distance - While standing and with a relaxed straight leg, measure the distance between the floor and the knee (Lateral Condyle). Repeat the measurement to make sure you get a consistent answer.
D - Linear Distance - While standing and with a relaxed straight leg, measure the distance between the floor and the hip (Greater Trochanter). Repeat the measurement to make sure you get a consistent answer.