#6-3/4 baronial envelopes are a particular style of announcement envelope with a large, pointed seal flap and diagonal seams most commonly used for greeting cards or social stationary. #6-3/4 Baronial envelopes measure 4-3/4" x 6-3/4" in size. #6-3/4 Baronial envelopes are perfect for that formal look when sending invitations or R.S.V.P. cards. The Supplies Shops also offers the panel cards that would fit these envelopes.