Whether it be a lock of hair, a ticket stub or special coins, our Keepsake Envelopes will ensure safe keeping for years to come. 4 small - 2.1" x 2.0", 3 medium - 4.1" x 2.1", 2 large - 4.1" x 3.6", 1 jumbo - 5.0" x 4.6". Self-adhesive with re-sealable flap, acid free and archival safe.