The Mead #10 Security Envelopes are designed for secure and private mail delivery. Measuring 4-1/8×9-1/2” and featuring a self-seal closure, these white envelopes offer peace of mind for your important documents and correspondence. With a pack of 45, they provide ample supply for your shipping needs while maintaining the confidentiality of your letters and packages. Ideal for businesses and individuals looking to protect their sensitive information, these envelopes are a reliable choice for secure mail transmission.