Publication 631 - Official Election Mail— Graphic Guidelines and Logos - Contents Medium Use Use the medium application on small- to medium-size envelopes that exceed the height of 4 1/8 inches and/or..." /> Publication 631 - Official Election Mail— Graphic Guidelines and Logos - Contents Medium Use Use the medium application on small- to medium-size envelopes that exceed the height of 4 1/8 inches and/or..." />