4-1/2x22; Compost Crock Filters, Set of 2 BENEFITS-Charcoal filters help control odors from food scraps stored in our Green Stoneware Compost Crock and other crocks that take a 4-1/2" filter. REUSABLE- May be taken out, rinsed and used again MEASUREMENTS- 4-1/2" diameter EASY to USE- Just slip into the top of lid