Measure your chest circumference using a centimeter or tape measure. In their absence, you can use a thread, then measure the length of the thread with a ruler.

Divide the value measured in centimeters by two, this is your half-chest circumference. If you want the product to fit loosely, add 2-5 cm to the resulting number.

Length is measured from the shoulder to the bottom edge of the T-shirt.

The easiest way is to take your product, place it on a flat surface and measure with a centimeter, tape measure or ruler.