JAM Paper Brite Hue Green 4bar A1 Envelopes measure 3 5/8 5 1/8 inches in size. These booklet style envelopes are sold in a pack containing a total of 250. Each one features straight flaps with reliable gum closures to keep items secure as they travel through the mail. The bright, vibrant green color of these envelopes has a festive and cheerful appearance and is certain to acquire the attention of all of their recipients! Because of their size, these envelopes are ideal for A1 sized, note cards, response cards, invitations, greetings cards, and stationery! Use them for you upcoming birthday, family reunion, or any other event!