The sturdy frame of our baseball cap cleaner goes right in the washing machine or dishwasher, so caps come out clean, maintaining their shape without a wrinkle. Just place hat or cap inside the frame to wash. This cap cleaner is great for golf and baseball caps, visors and even wool caps. Plastic baseball cap washer. 13 1/4" long x 8 3/4" wide x 5 1/2" high.