#7-1/2 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. #7-1/2 Baronial envelopes measure 5-1/2" x 7-1/2" in size. #7-1/2 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.