This yields liquid for about 7 quarts. I've made these twice as of 7/29/2025 and the most recent time I filled 7 total jars - 2 quart-sized and 5 pint-sized. The liquid wasn't quite enough for these smaller jars, so I'd recommend 1.5x or 2x the amount just to be safe.
I use McCormick Culinary Pickling Spice. It has a great pungent flavor and is a solid seasoning base.