Like almost any other prolific and well traveled painter, Robert Wood painted with whatever he found at hand. One will find authentic works by Robert Wood painted on canvas, wood panel, canvas -wrapped panels, art board, watercolor paper and even cardboard. He actually liked to paint over old canvasses that he had discarded and even on the work of amateur painters. Robert Wagner, for many decades one of Wood's best friends and painting companions, tells a story of Wood buying the works of amateur painters at a sidewalk art show in Palm Springs to paint over while they were in the desert! The majority of Wood's works were painted on stretched canvases and range in size from 8" x 10" to as large as 36" x 72". His most common sizes in the 1930s and1940s were 25"x 30" and 28" x 36." During the 1950's and 1960's, he favored 24" x 36" and 24" x 48" as his most common sizes.

Throughout art history the sizes of paintings that collectors favor have often been influenced by the interior designs of the era. In the Northern Renaissance collectors enjoyed collecting small "cabinet" pictures which fit into the small paneled rooms found in Dutch and Flemish row houses. In the 1950's and 1960's the postwar housing boom saw the construction of millions of long, low-ceilinged ranch- style homes which were decorated with long divans or couches. Long, narrow paintings suited these interiors well and consequently many Robert Woods were painted and reproduced by the print companies in 24" x 36", 24" x 48" and even 24" x 60."