Injection Site Tenderness. It is common to experience irritation and tenderness or discomfort if vitamin B12 supplementation is received by injection. These side effects tend to subside after receiving the shot.
The United States Postal Service recommends that mailboxes be 41-45 inches off of the ground and 6-8 inches back from the curb with a minimum recommendation of 4 feet off the ground for those people living in the city.
Quick Answer. Any envelope larger than the maximum dimensions for a United States postal letter (6 1/8 inches high, 11 1/2 inches long and 1/4 inch thick) requires extra postage. An envelope that doesn't exceed these dimensions and weighs one ounce or less will require only a single First Class postage stamp. Continue Reading.