I'm currently at about 39" waist and 44" hips. I have a beater Multicam kilt with removable pockets that has a 16" apron. With the right side pocket right at the apron edge it sits a little further to the rear than I'd prefer. I like my cargo pockets to sit pretty much straight down the side of my leg like on a pair of regular cargo or tactical pants. I make my pockets fairly big, with a large pleat on one side to allow for some expansion, so if I have to reach too far behind it just feels awkward. Several of my other kilts have 13"-14" aprons and allow me to locate the pocket in a much more accessible spot.

I was reluctant to go really narrow with my aprons because it felt too much like a Utilikilt ripoff, even though I personally like the way it looks. I finally decided to give it a shot and for a working kilt, I super dig it. It's really convenient to have the option of cargo pockets that sit more to the front when I've got to carry around poop bags, treats, or meds and want them easily accessible. At any given time I may also have a squirt bottle, pepper spray, a loop lead, or a walkie talkie attached to me as well. An extra narrow apron allows for me to arrange my pockets in whatever way I need to so that my stuff is where I want it to be.