Sleeve: Holding your arm straight out from your side, this measurement is taken from the shoulder to the wrist. Make sure to keep the tape is straight for the most accurate measurement. Sleeve: Holding your child's arm straight out from your child's side, this measurement is taken from the shoulder to the wrist. Make sure to keep the tape straight for the most accurate measurement.

Chest: Measure around the chest, under the armpits and over the highest part of your child's chest and shoulder blades keeping the measuring tape parallel to the floor.Sleeve: Holding your arm straight out from your side, this measurement is taken from the shoulder to the wrist. Make sure to keep the tape straight for the most accurate measurement. Chest: Measure around the chest, under the armpits and over the highest part of your chest and shoulder blades keeping the measuring tape parallel to the floor. Chest: Measure around the chest, under the armpits, and over the highest part of your chest and shoulder blades keeping the measuring tape parallel to the floor.