Bust circumference: Measurement around the bust in cm at the widest point (full circumference).

Back length: Length of the sweater from the back of the neck (excluding neckband) to cast off at the bottom. Given in cm.

Arm length: Measurement in cm from the arm pit to where you want your sleeves to end including the cuff. Note that it is arm legnth and not sleeve length.

Head circumference: Measure around the widest part of the head.