I'm going to start my own clothing line and call it "Skinny Minnies" - it will be bottoms for boys and girls who are not part of the obesity epidemic.
I cannot find one single pair of commercially produced shorts or pants that fit my daughter off the rack. Everything, including plain old Hanes sweatpants, has to be altered. I have better luck with my son because boy shorts are generally longer, so I can buy my almost 6 year old a size 4 and get away with it. Not so with the hoochie shorts they sell for girls.
And even sewing them myself involves extra fiddling...no commercial pattern fits either, so I have to cut what I believe is her size (8) and then do a little accordian fold to each leg until the fit is right. The above shorts are from last year's altered pattern, simply let out by 1 inch and lengthened by 2.5 inches.
On the plus side, I can pretty much make a pair of shorts in my sleep at this point!