I think mine were a bit bigger than those above, but not by much. About 1.5’’ diameter seems about right. My Laroda is definitely bigger at 1.6-1.7" (I measured a couple on the counter, which are a slightly larger than the Bubblegum plums were). I don’t have any pics or exact measurements, as I finished eating mine a day or two ago.
We got a lot of rain and cold early on this year, but the last month and a bit has been pretty dry. Not no rain, but maybe a bit less than usual. But I don’t think that had much impact on the size- they were about the same size last year (the first year I got any).
By 8/15, I picked about half a dozen and had about 20-25 left on the tree (see below pic). That night, something ate all but 4 of them, so there is some danger to leaving them hanging. They sure do have an interesting flavor. Some of them are a bit strong with the artificial taste, but I enjoyed the ones I had. I’m not sure that I’d want too many though. I think I prefer Satsuma and Laroda to Bubblegum and Superior. All of them seem to get into the high teens in brix for me.
Edit: added pic from 8/15. Of the fruit in the pic, there were only 1 or 2 left the next day.