Help grading/sizing Sunny day shorts, please?

Hello! I am making the Sunny Day shorts for my 9 year old daughter. I have come here looking for help picking what size to make because the pattern has finished measurements, and I don't know how much ease I should allow for. My daughter is tall and thin and her actual waist is 22 1/2 inches, her upper hip is 25 1/4", and the fullest part of her hip is 27 1/4. Her actual waist is so high that I don't expect or want shorts to go that high, so I guess that measurement is a bit pointless. I'm looking for a less baggy fit. If I make a smaller size that would go with a slimmer child and slimmer fit, would we run into trouble with the shorter rise? What size would you recommend for a child that size but with the longer rise of a 9 year old, for a more "fitted" but not tight fit? Thank you for any help.