This is refrigerator style canning, which means that even once the pickling process finishes, the peppers will need to be stored in the fridge until used.
Do not freeze in the jars. It’s likely the jars will crack and break, ruining all your hard work.
Do not overfill your jars. You want to leave room for the liquid to cover the peppers.
You can use various jar sizes, if desired. I tend to use whatever I have on hand. However, this recipe makes about 3 quarts.
You’ll have a little pickling liquid leftover, but not much. Further, the liquid is enough to fill jars that are already filled with the peppers. So, the recipe doesn’t make 3 quarts of liquid, but creates 3 quart jars of pickled peppers, just to be clear.
It’s important that you let the liquid cool to room temperature before placing the jars in the fridge. It allows the peppers to soften.