Vintage Martz Marshall Studios Pottery Signed Blue Blueberry 4 Dinner Bowls 5.5. Excellent Condition, no cracks or chips. Color: Blue (Boysenberry / Blueberry). Diameter Top: 5.25 in. Diameter Bottom: 4 in. Height: 2.25 in. Weight (Individual Bowl): 1 lb. Part of the Blueberry / Boysenberry / Blue Dish Collection from Marshall Studios Pottery handmade in Veedersburg, Indiana.