Art Boards Round Canvas Stretchers are a one piece construction and come in 10 different diameters.
Round Canvas Artist Stretchers made by Art Boards™ Archival Art Supply for Artists to stretch canvas for tondo paintings.
10" Round Stretched Canvas White - Mondo Llama™ : Target
Paramount Oval and Round Stretched Canvas | Jerry's Artarama
Amazon.com: Round Canvas Board Stretched Canvas White Blank Canvas Frame Art Craft Set of 2 (20/30 cm) for Acrylic Painting Oil Paint Artist Media
Custom Stretched Canvases - Any Shape or Size | Art Canvas Stretcher Bars | Serving USA & Canada
Fredrix Oval and Round Stretched Canvas | Jerry's Artarama
Amazon.com: Amosfun 24 Pcs Round Stretched Canvas Painting Round Shape Canvas Board Paint Canvas Large Canvas Art Canvas Blank Canvas Boards Mini Canvases Easels to Stretch Wooden Easel White Child
Amazon.com: WA Portman Circle Canvas 2 Pack - Small & Large Round Canvas - 20 cm & 40 cm (15.75 inch & 7.9 inch) Diameter - 2 Circle Canvases for Painting - Round Canvases for Painting - Shaped Canvas 2 Pack
Amazon.com: WA Portman Circle Canvas 2 Pack - Small & Large Round Canvas - 20 cm & 40 cm (15.75 inch & 7.9 inch) Diameter - 2 Circle Canvases for Painting - Round Canvases for Painting - Shaped Canvas 2 Pack
Masterpiece Round and Oval Pro Canvas | BLICK Art Materials
Artist First Choice Round Stretched Canvas 20 Inches