Kindershirt

Size (inch)	4-6	6-8	8-10	10-12	12-14
Width	13,7	14,3	15,3	16,7	18
Height	17,3	19,2	21,2	23,2	25,1

To get good measurements, lay the shirt (preferably the one you love) on a flat, hard surface, then if there are any creases, smooth them out as much as possible

Width: place the ruler from the bottom of the sleeve and measure the width stopping under the other sleeve.

Height: measure from the highest point of the shoulder (top of the collar) to the bottom of the shirt.