Excuse me, what is the size, length and width of the no-smoking signs posted in some elevators? Urgent need ~ ~ ~

the general size of this sign is 1*3mm, and some sizes are 12*36mm. There are three kinds of materials: plastic, aluminum alloy and stainless steel. The grades are improved in turn, and the prices are also increased in turn. This sign can reach ready-made products in stationery stores and can also be purchased on Taobao. The size is slightly different, but it does not affect the use.