wide mouth jar lid

Common sizes shown include about 3.38 inches and 3.5 inches, plus metric listings such as 86 mm (≈3.31–3.54 in) and a specific 3.31 in / 84 mm option for wide-mouth jars.

Typical sealing features include a BPA‑free sealing compound, silicone sealing rings or gaskets, a pop safety button for quick seal checks, and designs that form an airtight silicone seal for pantry storage.

Yes. Options include silicone fermentation airlocks with one-way valves for venting and child-resistant plastic lids with push-down-and-twist locking (some with inner dividing tubes for organization).

Reviewers frequently report a snug fit and compatibility with wide-mouth mason jars, noting leakproof and airtight performance and generally reliable seals for canning and storage.

Extra features include writable surfaces for dates/contents, pop safety buttons for quick seal checks, and molded areas or space designed to make applying labels easier.