#000 SELF-SEAL BUBBLE MAILERS. These 4" x 7.25"inch self-sealing bubble mailers are designed to save your time and money. These padded sturdy envelopes should be your first choice. SECURE. Just peel and seal to create a strong lasting seal, no need to worry about your contents failing out during transit even when shipping hefty shipments like half size catalogs or magazines. LIGHTWEIGHT. These bubble lined envelopes are lightweight and do not add to your shipping costs. Padded envelopes are completely opaque and protect the shipped items from prying and curious eyes. DURABLE. These mailer envelopes are made from durable gold kraft paper lined with 50gsm bubbles helping absorb shock during shipment. These can provide effective shipping protection for your products. MULTI-PURPOSE. Envelopes can be used in home, office, business and where there's a need for shipping. The bubble envelopes feel nice to the touch and are perfect for handwriting, labeling and stamping.