|Not many of these long time household necessities around any more. Auctioneer stated the size as being 5 5/8-inch, which I assume means the height. Note the text on the jar which reads "MASON'S PATENT NOV. 30 1858". That would have been well before the days when iridecense was applied. And I don't think they are any longer iridized. An exceptional example of a classic American product.
This example sold in 2021 for $325. Photo courtesy of Burns auctions.
A bit more: In the days before refrigeration, it was a challenge to keep food from spoiling. Early efforts by the French in 1806 involved finicky, messy wax seals on dark jars, which wasn't too effective. And that method was far too complicated for widespread home use.
That all changed in 1858, thanks to John Landis Mason, a 26-year-old tinsmith hailing from Philadelphia. He patented the Mason jar -- yep, it's named after him.
His design featured a couple of key innovations. For starters, there was the one-piece screw-on cap made of zinc, which created an airtight seal that kept bacteria and bugs out as hot liquids cooled. Then there was the molded, clear glass, which meant that people could now see the contents of their jars! Obviously, that had enormous appeal.