The first thing you need to know is that the standard size for numbers has changed in the Placer County Region recently.  Inspectors now look to make sure that you have 4" numbers.  If you have four digits in your address then you can go with a 6"x18" and the stock holes will not interfere with the number placement.  If you have five digits in your address then you need to purchase a 6"x24" sign.  The fire department in this area tends to purchase 6 foot posts so that once you sink it in the ground two feet the vertical address sign will stand at four feet tall.  The color scheme for this region is green/ white.  Call with any additional questions or for pricing on a complete set up.