A: Chest - Circumference at the widest part.
B: Waist - Measure at your normal beltline.
C: Shoulder to Shoulder - Shirt shoulder seam to shirt shoulder seam.
D: Neck - Circumference of neck.
E: Sleeve - Measure from the back of the neck at the center to your wrist; arm bent 90 degree angle at the elbow.
F: Inseam - Crotch seam to ankle bone.