BASIS Soft Pink A1 (4 bar) Envelopes 250 pack - Limited QuantityBasis A1 Square Flap Soft Pink envelopes are the perfect envelope for enclosing your wedding response cards. These cost effective RSVP envelopes have a square flap with a fine vellum finish. Measuring in at 3 5 8 x 5 1 8 inch, these 4 Bar envelopes will hold a party RSVP enclosure up to 3 1 2 x 5 inches. With a broad range of colors, Basis is sure to match your DIY invitations. These are the smallest envelopes that can be mailed through the USPS. The