Petite Heart Silicone Muffin Pan by Wilton. Discover the convenience and easy release of flexible silicone bakeware. Freezer, refrigerator, microwave and dishwasher safe-oven safe to 500 degrees. One mix makes 40-48 petite hearts. 12 cavities, each x 1 1/2 x 1 1/2 x 1 in. deep.