The Baronial Envelope's triangular pointed flap is considered appropriate for both social and commercial applications,
while the straight flap in the same sizes is considered casual and more fitting for commercial use.
Most common baronial sizes:
No. 4 Baronial (4 bar)
3.625" x 5.125" | 92mm x 130mm
No. 5.5 Baronial (5.5 bar)
4.375" x 5.75" | 111mm x 146mm
No. 6 Baronial (6 bar)
4.75" x 5.5" | 121mm x 165mm
Lee Inner (ungummed)
5.25" x 7.25" | 133mm x 177mm
Lee Mailing
5.5" x 7.5" | 140mm x 190mm
Other sizes exist. Ask your stationer to clarify envelope size before assuming your envelope
will be created to the common standard.