Does anyone have any experience with those collar button extenders (basically a loose button on a small loop of string, designed to be placed around the proper collar button to add ~0.5-1" to the collar size). I've been exercising more recently and my neck has gotten a touch thicker. Combined with OCBD shrinkage, my collars on half my wardrobe are suddenly rather uncomfortable. Obviously I don't want to replace half my shirts. Do those extenders work subtly or do they muck up the shape of the chest/neck area too much to be worth using?