Also, Arcanine is stated to have a height of 1.9 metres. Taller than most humans. Would have a hard time fitting into most living rooms. Hariyama is even taller with 2.3 metres, its head almost scraping the ceiling of most residental homes.
On the other end of the scale, Uxie, Mesprit, Azelf and Jirachi are no taller than a 1.5 litre soda bottle. Your forearm is probably longer from elbow to fingertip than these pixies would be.