Please let us know the number you need. 1, 2 or 3 digits. We'll be in touch if there's a design question.
Material
Choose Material for the placard. Be sure if you choose magnetic, that your door is steel. You can safely test this with a refrigerator magnet.
Magnetic material is the longest lasting, but doesn't work for aluminum hoods/doors. Reusable vinyl and static cling will work on any surface, longevity is dependent on many factors.