Steel letters and numbers are 4-12" tall. They are cut from steel about as thick as a nickel and each has two to four 0.2" holes to install into your wall or sign. The holes are horizontally aligned throughout the full collection of letters and number digits so that you can install all letters in a straight line easily if you use the same font. Raw, unfinished steel will rust with time if left uncoated. You can spray paint the letters upon arrival so that they match your décor with this option. The raw, unfinished steel letters and numbers also make great stencils! Simply place painters tape over the holes to spray paint around the letter. Great option for a simple new house number or custom gift! We hope that our new letters and numbers can help you finish up your latest project easily and with your own unique style.