While the National Electric Code (NEC) has not specified a minimum, ideal and maximum height for electrical meter boxes, the utility company does. While utility companies may differ, most agree that the centre of the meter box should be between four feet and six feet above the ground.
The current price of a first class stamp is 49 cents. A domestic first class letter (1 oz.) is 49 cents. The price of each additional ounce is 21 cents. It will cost you 34 cents to send a domestic postcard.
@anon39270, the stamps only hold the value that you originally purchased them for. i.e. The current price for a forever stamp is .44 cents (2010) so 20 years from now the value of that same stamp will still be .44 cents, even if the price for one ounce is $2 then. So, you would need five forever stamps from this year for 1 ounce in 20 years.