The Super Pro Palette features 28 wells for holding pigments and three divided mixing areas. The inverted lid can be used as an additional mixing area. The lid will keep paints clean and help retard drying up to several weeks. Palette is double-sided, designed for oil and acrylic paints on one side and watercolors on the other. Palette includes five Sta-Wet palette paper sheets and one sponge. Paints will slowly absorb moisture from the sponge to keep paints wet for hours while the palette is open. Overall palette dimensions are 15.5" L x 11.5" W x 1.75" H, sponge and paper refills measure 10" x 14.5". Packs of 30 refill sheets also available.