A Shiba Inu is about 21.7 in (55 cm) long and 15.7 in (40 cm) tall, weighing 22 lb (10 kg). In comparison, a Keeshond is about 23.6 in (60 cm) long and 17.7 in (45 cm) tall, weighing 39.7 lb (18 kg). The Keeshond is about 1.09 times the size of shiba inu.

How much space each takes up
Keeshond is about 1.09 times the size of shiba inu.
Typical adult or standard sizes; real ones vary.