0.63 ozt of sizes 3M20ss and 3M18ss, mixed together.
Personally, I would choose to make a slightly loose European 4-in-1 with the 3M20 rings and a delicious perfect Jens Pind with the 3M18 rings.
Sometimes two (or more!) sizes get mixed together and I don’t want to fuss with tweezing them apart. These mixed batches are 10% off the least expensive size – sold as an entire batch only.