Manton, that's probably true. I personally don't have much experience with suits of lighter fabrics and light construction, so I appreciate the correction.
In Seattle, I can see why you wouldn't. One more thing: it's important that the shape be right. Â The opening at the top should be cut straight, but the corners at the bottom should be fairly dramatically curved. Â The sides should angle gently inward toward the top. Â The widest point of the pocket should just above the curves; the opening at the top should be narrower by a fraction of an inch on each side. Â Pockets cut like this (narrower at the top, wider at the bottom) replicate the shape of the coat's skirt. Â Also, the curved edges at the bottom of the pocket reflect the curved edges of the bottom of the coat front. Â That's why the front edges of pocket flaps are also curved in the same way on SB coats, but cut at an angle on DB coats. Â (By this principle, one might think that patch pockets on DB coats should be cut square, but it doesn't work this way. Â One of the irrational exceptions of tailoring. Â "Irrational" but not pointless; sqaure cut pockets would be a lot less graceful.)