While oval-shaped Nagami kumquat fruit is less than an inch in diameter and a little over an inch long, a calamondin fruit (a hybrid between a kumquat and a mandarin orange) is a 1-to-2-inch globe.

While oval-shaped Nagami kumquat fruit is less than an inch in diameter and a little over an inch long, a calamondin fruit (a hybrid between a kumquat and a mandarin orange) is a 1-to-2-inch globe.