This is how I make my own boxes to ship my artwork. By making it to size you are cutting down on weight and dimensions which is great for the shipping cost
Art Crating Solutions - Rebul Packaging
Scott Hutchison – Shipping Art in a Box
Shipping Strazza Art Restoration
Recommend Art Shipping Boxes. Breakfast with Sergio
Speed bump
Custom Boxes and Packaging
Ampersand Art Claybord Box Kit
Regan Tetlow
Material: Made of high quality food grade kraft paper,durable and sturdy,making your gift or dessert more delicate and elegant Dimension: Each mini
BadenBach 100 PCS Mini Kraft Gift Boxes,2.16 x 2.16 x 0.98,Small Cardboard Paper Jewelry Present Soap Coin Shipping Boxes for Valentine's
Japanese Cardboard Artist Turns Old Boxes Into Tanks, Food
Art Shipping Boxes