Poly Mailers 12" x 15.5" #4 - Pack of 1000 Poly Mailers 12.5" x 15" #4 - Pack of 1000 is an ideal way to meet all of your postage needs at an affordable price. Because the poly mailers are 12-inches-wide and 15.5-inches-long, they are large enough to hold a variety of different items. The packages are an ideal way to send all of your goods that do not require extensive protection during transit. This particular mailer is large enough for small to medium sized items. For ease of use, the mailers have a self-sealing adhesive that is simple to close and ensures security during transit. Saving money on regular shipping costs is a great way for businesses to improve their bottom line, and these Poly Mailers 12.5" x 15" #4 - Pack of 1000 are light-weight for the most affordable postage costs. Clothing is one kind of product that is ideal for sending inside a poly mailer. This bulk package includes 1000 envelopes that are large enough to hold several t-shirts, a pair of jeans or a light jacket. Since these envelopes do not include any bubble protection on the inside, they are not recommended for fragile items. The Poly Mailers 12" x 15.5" #4 - Pack of 1000 is ideal for soft items, books, clothing, accessories and magazines. To ensure that your package of envelopes reaches the destination without damage, they are sent in a sturdy protective box. At 12-inches-wide and 15.5-inches-long, these mailers are ideal for sending documents and paperwork. The envelopes are slightly larger than a standard sheet of paper, which makes them an ideal choice for magazines and documents.