Ball 4 oz Mini Storage Mason Jar The iconic Ball Mason Jar in miniature size. What this tiny 4 oz jar lacks in size, it makes up for in style. Ball enthusiasts will love the attention to detail and quality that Ball is known for. These mini jars are a great option for herb storage and crafting. These special jars include embossed ml and oz graduations. Jars include a one-piece metal lids. These clear glass mason jars are sold in a case of 24 total jars with lids. Cases are packed with six smaller packs. Each of these inner packs contains 4 jars. Not intended for home canning.*Bisphenol A is a chemical sometimes used in the manufacture of certain plastics. Bisphenol A was not used in the manufacture of this item.