Formed plastic numbers are a popular and durable option for your building address numbers. The deepest option for the money: 6″ tall number is 3/4″ deep, 12″ tall number is 1″ deep, 18″ tall number is 1 1/2″ deep and 24″ tall number is 1 1/2″ deep. Each number comes with pad mounts on the backside. Just add silicone or liquid nail adhesive to pads and stick to the wall (adhesive not included). Typically ships within 5-7 business days.