PRODUCT DETAILS • #4 SELF-SEAL BUBBLE MAILERS. These 9.5" x 13.5" 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.