Set of 50 Miniature Proterra Seed Envelopes - Die 13 (2.56" x 3.62") Great For Party Favors, Saving Seeds, Storing Keys & Other Small Objects! Set of 50 Miniature Seed Envelopes. The paper texture is a kraft like paper, properly named "Proterra." Each seed envelope measures 2.5625" wide by 3.625" tall, when sealed. These seed envelopes DO NOT have a self sealing solution. A glue stick is recommended, but not provided with these envelopes. Seed envelopes are perfect for storing, or saving seeds from the garden. They can also be useful when storing other small objects, such as keys, sd cards & other memory cards, coins, beads and more. Designed specifically for smaller seeds, these seed envelopes will seal completely, closing the corners of the packets, preventing seeds from leaking out of the corners.