Business envelopes, also known as commercial envelopes, are characteristically open side style with diagonal seams. White #6-1/4 Business envelopes measure 3-1/2" x 6" and are made from 24# white sulphite stock. White #6-1/4 business envelopes are also have the option of a blues Wesco tint to protect the contents of your mailing.

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.