A heap of 100 walnuts is 15.5 in (39.4 cm) wide and weighs 3.31 lb (1.5 kg). In comparison, a western gray squirrel is about 21.7 in (55 cm) long and 8.66 in (22 cm) tall, weighing 1.65 lb (750 g). The western gray squirrel is about 1.40 times the size of 100 walnuts.

How much space each takes up
Western gray squirrel is about 1.40 times the size of 100 walnuts.
Typical adult or standard sizes; real ones vary.