Who creates grade rules?

Some one asked me a grading question the other day. She wanted to know who creates grade rules?

A pattern maker, grader, or you could make the grade rules. If you choose to make the grade rules yourself, I have some guides available in The Organized Fashion Designer and The Simple Tech Pack. It's harder with children's clothing because there isn't as much standardization. An experienced grader should have some standard charts or be able to develop rules off of your measurement charts. I would personally start developing grade rules by referencing the Jack Handford book and make modifications as needed. I would only let a pattern maker or grader do it who has experience with it.

You can buy measurement charts from ASTM as a place to start. The ASTM measurement charts for children are probably the best resource for children's body measurements. Be cautious of using free charts found on the Internet. I have seen free measurement charts on the Internet riddled with inconsistencies that could lead to serious errors.

If you have time, you may want to sew up the smallest and largest sizes just to double check the grade and sizing. It doesn't have to be in your production fabric or anything. A fitting is the only way to know if your grade is correct. You won't need to do this on every style or very often. Kind of important when starting out though.