These hand-glazed lids are designed to work with our 3- and 5-gallon stoneware crocks, made by an Ohio company who makes them as they've been made for a century. The lids rest on top of the crocks, keeping contaminants out of your fermenting foods while allowing gases to escape. High temperature-fired for durability. Finished and glazed by hand. 3-gal. crock lid: 1 1/2" x 13" diam.; 7 lb. 5-gal. crock: 1 3/4" x 15" diam.; 10 lb.