Specifications include, but are not limited to: (1). EnvelopeSize a. Four and eleven-sixteenth inches by eleven and seven-sixteenth inches (4-11/16” x 11-7/16”). b. Envelopes larger than the given dimensions will generate significant U.S. Postal Service penalties. This envelope shall never be over eleven and one-half inches (11-1/2”) long. Envelopes smaller than eleven and three-eighths inches (11-3/8”) long shall not be accepted, as they will adversely affect insertion operations. The tolerance is plus or minus one-sixteenth inch (±1/16”) of the given dimensions. (2). Paper a. Stock shall be: 1. White Wove, sub twenty-four (24) pound. 2. Caliper 4.7-5.3 with 4.88 as the target. 3. One hundred seventy (170) plus or minus fifteen (±15) Sheffield Units (SU) of smoothness on the felt side (outside). 4. Brightness 84% and opacity 90%.