JAM Paper Brite Hue Blue Recycled 4bar A1 Invitation Envelopes measure 3 5/8 x 5 1/8 inches in size, making them ideal for A1 sized note cards response cards, invitations, and stationery. This full carton contains a total of 1000 envelopes! Each one features a straight flap with a dependable gum closure to keep enclosed items secure in transport. Made out of smooth, 30% recycled, 24lb paper, these reliable and earth-friendly envelopes are great for special occasions and personal or business events. Their vibrant, stunning, bright blue color is certain to get attention and to brighten up the day of any recipient! Use them for wedding response cards, baby shower invitations, and more!