Learn how to safely ship your paintings up to 36 by 36 in size with these helpful tips. Avoid using bubble wrap directly on the painting surface to prevent impressions, and instead use glassine paper for protection. Use heavy-duty cardboard, cardboard corners, and sliced pool noodles for added protection. Secure everything with plastic wrap and consider using a modified box or furniture mirror box for a perfect fit. These tips will help artists sell and ship their paintings successfully.