Searching for Envelopes, 6 Square (6-x-6) found in the Black Color Group, 89 GSM (24/60lb Text) --learn more about Black --2PBasics Envelopes. Also, jump to our popular help pages for paper help. (To make a successful paper selection, it is important to have a brief understanding of text weight and cover weight papers.) AND envelope help (It is important to remember that inserts must always be smaller than the envelope dimensions.)