| Most artists use clear bags from a company called
Impact Images. They
are available in all standard sizes and have a self sealing adhesive strip. I've even had custom sizes
manufactured for me, when the quantity met their requirements. When that piece of artwork sells, whether it's 2D or 3D,
it's important to have it seen as your customer walks the show. For that
purpose, I use clear plastic bags in various sizes from a company like Evergreen Bag.
Like the Impact bags, these bags are available in almost any size