How do I measure correctly?

Take a sweater vest that fits you well from your closet, place it on a table and measure the dimensions as follows:

1. Length: Place the measuring tape at the left or right shoulder point and measure tightly from top to bottom to the end of the sweater.

2. Width: Lay the sweater straight on the table and measure the width along the chest from left to right, from armpit point to armpit point.

Sizes may vary between 2-3 centimeters as they are measured by hand.