I wanted a simple way to indicate to others, and myself, when the dishes were either clean or dirty while in the dishwasher. So now I just flip the sign to clean when I start a load and flip it to dirty after I take them out. Magnet not included. Default measurements are around 90mm x 70mm.Printed mine at 15% infill and .3mm layer height. Obviously print at whatever intervals you like. I didn't fill like wasting a lot of material. I also hot glued a magnet to the back so that it could just be stuck right on the dishwasher.