MEN’S SIZE CHART - cbcorporate.com NECK Measure around your neck at the point where a shirt collar band encircles the neck. CHEST Place tape measure up under arms and measure the fullest part of the chest, keeping tape parallel to the NECK Measure around your neck at the point where a shirt collar band encircles the neck. CHEST Place tape measure up under arms and measure the fullest part of the chest, keeping tape parallel to the floor.