To size the IPS Vest Protector by Pro-Tec, take the chest measurement around the fullest part of your chest , under arms and around the shoulder blades.
The back length measurment is from the nape of the neck to the bottom of the back pad. Approx Measurements.
Small
Chest = 84cm - 89cm (33”-35”), Back length = 41cm - 46cm (16”-18”),
Medium
Chest= 89cm - 94cm (35"-37”), Back length = 46cm - 51cm (18”-20”),
Large
Chest = 94cm - 99cm(37”-39”), Back length = 51cm - 56cm (20”-22”),
X-Large
Chest= 94cm - 104cm (39”-41”), Back length = 56cm - 61cm (22”-24”),
Sizes of products may vary between manufacturers and even between different designs by the same manufacturer. The size charts should be used as a general guide.