I bought these polo tops for myself, because I am tired of uncomfortable dress shirts at work. they fitted beautifully through the bust and arms, but were a smudge too tight across the belly (its gravity i tells ya!)
So, since the work shirt that the rest of the staff wear has a light blue panel down the sides, I figured I would slice it up the side and insert my own light blue panel, but taper it so it gives me more room around the middle. The panel is about 2 inches under the arm and down the side bust, but tapers out to just over 5 inches from about the waist down, giving me comfort room. I did the panels in two pieces, to match the style of the regular uniform, and also to make it easier to coverstitch it down.