
You can find these handy bubble envelopes at USPS online stores, your local post office, and other shipping supplies locations (Mailboxes Etc, anyone?).

From Chicago to Florida, from San Francisco to New York - it doesn’t matter! How to Get USPS Padded Envelopes

That is the exact cubic dimension of your package.Everything you can squeeze in a 9.5in (L) x 12.5 in (W) envelope will cost $8.55 to ship. Multiply the Length, Width, and Height, and then divide that total by 1,728. For boxes that aren't square, measure the Length, Width, and Height of your box in inches. A 2 cubic foot square box is pretty big and well beyond the size of most packages being shipped. A square package 2 feet by 2 feet is 2 Cubic feet. A square package 1 foot by 1 foot is 1 cubic foot. *Calculating the cubic dimensions of your packages isn't difficult. And when shipping packages, select Large Package. We suggest reviewing your shipping process to ship in the smallest box possible to avoid these surcharges.

