Signs to put lot numbers on for empty lots

I am looking for signs I can put lot numbers on for my empty lots, what does everyone use.

A little late to the game here, but signs can be expensive and difficult to maintain any uniformity. We have 4 inch number stencils and spray paint them directly onto the concrete. First a rectangle of white paint and then the numbers in black. It has worked well and looks good.

Vinyl stickers on the electric meter boxes.


We also put stickers on the electric pedestals.