These translucent non-vented deli cup lids fit our 8, 16 & 32oz. deli containers. Perfect for transporting frogs, springtail cultures, high humidity plant cuttings and our favorite use, as dart frog egg laying when placed beneath CoCo Huts. Disposable or reusable and more economical than petri dishes! These lids fit the deli cups that we sell however, it might be a good idea to test fit them on brands other than ours before buying in bulk quantities. (Containers sold separately) 4.5" diameter.