Don't Be a Square - Preparing Circular Painting Panels - Jackson's Art Blog
Small Cradled Canvases, Set of 3 Nesting Trays, Unfinished Circle Wood Panels for Painting, Wood Signs, & Resin Art, by Woodpeckers : Amazon.co.uk: Home & Kitchen
Raw Round Wood Panel - 1/2" Baltic Birch Circle for Painting | Trekell – Trekell Art Supplies