50 Blank "Citrus Green" Seed Envelopes (Self Sealing) - Customize Your Own Seed Packets! These blank, self sealing seed envelopes measure 4.50 inch tall by 3.25 inches wide when sealed. The envelopes include a 1/2" flap with green self sealing adhesive glue. Perfect for saving and storing seeds, or other small materials and objects, such as screws, beads, sd cards, coins and more. These specialty seed envelopes by Seed Needs are designed to hold in even the smallest of seeds. Seed envelopes packaged by Seed Needs, a brand known for it's quality seed products.