These are the Metalized Static Shielding Bags, 10" by 16", Open-Top, from Static Control Components.

They are heat sealable, and good for many larger components.

10" x 16" is the inside measurements and they are flat, so you have to make allowances for more thick parts.

Also sold in lots of 25 ($13.99) and 100 ($37.99) bags.

Protect Your Electronics!

Static charges can damage your components

in handling, shipment and storage.