Weck Jar lid

Gasket, clips and lids for Weck jars are sold separately.

I cannot search the internet or visit websites, including the Weck manufacturer's website, for specific product information. However, I can suggest that the 8 cm diameter in the context of a Weck jar lid most likely refers to the outside diameter of the entire lid at its widest point. In the case of jar lids, the diameter usually quoted refers to the outer edge that fits around the jar, not the inner piece. For accurate information, it is best to check the product specifications on the manufacturer's website or in the documentation that comes with the product.