That towel method sounds like a good idea. So, I came up with a 47.5 in hip with the towel method (I think it looked about right, according to my girlfriend). So, I have 42 w 21 split apron 21.5 pleats 20.5
47.5h 23.75 split. You said to keep the hip even, so 23.75 for both the apron and pleats. Does this sound like a good ratio?