4 Bar A1 Envelopes - 3.625 x 5.125
A1/4 Bar Envelopes (3 5/8 x 5 1/8) envelopes are the most popular envelope size used for RSVPs as the A1 fits inside all other "A" envelope sizes. Our A1 Envelopes are available in two flap types, an elegant square flap and sophisticated contour flap. This envelope size holds 3 1/2 x 4 7/8 cards and inserts.
