4 3/8 x 5 3/4, 111 x 146mm, A2 68lb Text, 101g/m2, Matte Euro Flap, Envelopes Storm Cloud, Blue, Gmund Colors Matt 25 Pack These A2 4 3/8 x 5 3/4 invitation envelopes in our contemporary Euro-Flap (deep neck) style are made from Gmund Colors Storm Cloud 68lb text weight paper. A2 envelopes are primarily used for RSVP cards and note cards and correspond to our A2 cards measuring 4 1/4 x 5 1/2. Storm Cloud text paper is a light shade of blue gray with a slight tinge of purple, contains a matte finish and offers superb printability. These papers are PH-neutral with outstanding fade and age resistance.