Blue Rose Polish Pottery Willow Extra Large Rectangular See Description. Safe to use in microwave, dishwasher, freezer, oven.Polish pottery is highly regarded for its even baking and easy cleanup. Prepare brownies and casseroles, then serve straight from the oven to admire the hand painted designs. 13 x 10.5 x 2 inches deep. Description13" x 10.5" x 2 deep.