They are mostly size 20 which is small, about 600ml. I've been canning fruit every day recently, pears, apricots and peaches, from the garden or the side of the road. These are the right size for jam or stock which I might make later in the dressing season, or maybe tomato passata if there are cheap tomatoes on the market this year.
I found a couple crates of preserving jars at the local dump. For over a century this town has been burying rubbish in big holes in a nearby piece of land and if you're quick you can find treasures. These are Fowler's Vacola jars which is an Australian standard preserving system. Unlike Ball jars the lids have a rim that goes over the lip of the jar. The rubber seal is a band that fits in a groove and the lid is held on during preserving with a spring clip.
A lady came into the Bathurst Vinnie's while I was standing at the counter, wanting to donate her late father's clothing. They wouldn't accept them because apparently they only take clothing early in the morning. Luckily I spotted these Ian Harold cork sole boots and offered to give her 20 which she could stick in the donation box. They fit perfectly.
Rev. Artilect Zed