#12 Envelope
Business envelopes, also known as commercial envelopes, are characteristically open side style with diagonal seams. #12 Business envelopes measure 4-3/4" x 11" and are come in a range of paper stocks, colors, weights, flap and seal types.
Business envelopes are used for standard mailing purposes such as:While historically the smaller sized envelopes were known as commercials and sizes 7 through 14 were called officials, the Envelope Supplies Shop uses the term business envelopes for all sizes.