The bowl is 8.5" diameter at the top. Feijoa fruits are from 1.5" long (medium-sized ones) to 2.5" long (larger ones). Larger Marion fruits are close to 3" long and about 1.5" in diameter. Fruit size varies between varieties and even between fruits on the same bush (unless thinned).
For me, Nikita ripens the first (this year, first fruit was Oct 10), while the rest of the varieties started ripening between Oct 18 and Oct 27. However, the harvest lasts several weeks (up to a month), so ripening windows for different varieties overlap. This year, feijoa harvest is about two weeks earlier than last year (probably because this Fall was very warm).
I got mine (along with several other varieties) from Patrick Schafer, it was discussed a few times before: