2. Chest - make sure kids chest is not bigger than size chart.
2. Sleeve length - With arms down to wrist plus 1 inch.
3. Waist - Go around the regular waist (use belly button as a guide). Add 1-2 inches to your measurements then compare to chart. Child's measurements must not be bigger than the chart.
4. Pants outseam - from waist to floor. It can be hemmed.
5. Compare measurements taken to the chart below. Do not chose a smaller size than your own measurements.
Wow is what I can say about this suit. Quality is excellent and the fit is perfect for my skinny 12 year old. He fitted on a size 16. I used the size chart and it matched all the way. He is happy with his grad suit. Finally a suit that fits.