White
Business envelopes, also known as commercial envelopes, are characteristically open side style with diagonal seams. White #10 Business envelopes measure 4-1/8" x 9-1/2" and are made from varying paper weights. White #10 business envelopes are standard for mailing and come in a range of paper stocks and weights, flap styles, 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.