24 eBay Branded Polyjacket 10 x 12.5″ and 12″ x 15″ Envelopes Shipping Supplies. Colorful Envelopes Shipping Supplies. These envelopes have no padding. You will receive either green, blue or red, whatever we have available. This is a great deal so take advantage of it while they last! Included sizes are as below: 12 – 10″ x 12.5″ size12 – 12″ x 15″ size Stored in smoke free, pet free home. FREE SHIPPING!