Gargantuan

Gargantuan sized creatures and objects take up at least 20 ft x 20 ft of space.
They are 20 or more feet tall and weigh more than 4000 lbs.
Assuming a clear line of sight, Gargantuan creatures and objects can be seen at a distance of 2000 feet or more.

Size Categories

Space taken up by different-sized creatures.

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Size	Space	Height	Weight
Tiny	2 1/2 by 2 1/2 ft.	< 2 ft	<10 lbs.
Small	5 by 5 ft.	2+ to 4 ft	10+ to 100 lbs.
Medium	5 by 5 ft.	4+ to 7 ft	100+ to 250 lbs.
Large	10 by 10 ft.	7+ to 10 ft	250+ to 800 lbs.
Huge	15 by 15 ft.	10+ to 20 ft	800+ to 4000 lbs.
Gargantuan	20 by 20 ft. or larger	20+ ft	4000+ lbs.