Ilona.

I grew a couple of these plants outdoors in open ground. They got to be about 5 feet (1.5 m) tall. The tomatoes are red, round, and weigh about 3 to 4 oz (80-110 g). They are nice and firm, which makes them absolutely perfect for canning whole. Both of my plants were really heavy yielders.

Harvest of red round Ilona tomatoes in a container
Ilona tomatoes stacked showing round shape and uniform size