JAM Paper® Brite Hue Sea Blue Recycled 9 x 12 Booklet Envelopes are made out of smooth, high quality, 30% recycled, 24lb paper. This full and complete carton contains a large and even total of 1000 envelopes. Each one measures 9 x 12 inches and opens on the longer end. To keep the contents placed within them secure, these booklet style envelopes have straight flaps with reliable gum closures. These envelopes feature a bright sea blue color that is certain to cause them stand out and get noticed by observers and recipients! Because of their size, these envelopes are ideal for enclosing standard sized sheets of paper without folding them and creating creases!