Dl Envelopes
This is the workhorse of a mailroom and the one to standardise on, because almost all business correspondence is a page or two folded in thirds. The detail worth checking is the window, since a window that does not align with the address block on your letterhead means every envelope needs a label instead. Self-seal saves time on a long run. See envelopes, C5 envelopes and DLX envelopes.
