Size Med: measurements in pics
Sleeveless base layer is an ultra-light weight first layer that aids in moisture management and pairs perfectly with aero and tight fitting tops.

How to Find the Proper Fit:
Take measurements close to the body, not over clothing. Use a flexible measuring tape to perform the following measurements:
Chest: Measure at the fullest part of the chest
Waist: Measure circumference at the narrowest part
Biceps: Measure the circumference of the muscle
Weight: Estimated recommend range