SizeWeight in kgChest cm2XS30-4080-85XS35-4585-90S40-6090-95M60-7095-105L70 105-115XL70 115-1252XL70 125-135T ip: Use a flexible tape measure. This will ensure that the product fits correctly later. Alternatively, you can also measure with a piece of string and then re-measure it with a ruler. How to measure: Follow the instructions below and compare the measurements with the size chart. CHEST Measure the circumference of the chest around the fullest point.