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.
The current postage needed for an international postcard stamp is $1.15 for a standard shaped and size one, in fact it's the same price for a letter of 1oz or less. The USPS lowered the rate from $1.20 back to $1.15 in middle of 2016.