"Sheer magnitude" refers to the extremely large size, scale, or force of something. It emphasizes the immense and overwhelming nature of a particular thing or situation. Full definition
Measuring approximately 1,200 feet long and weighing 223,000 tons, the size and and sheer magnitude of the ship is almost mind boggling. (businessinsider.com)
This is because the 9/11 memorial relies not on symbolism but on sheer magnitude for its effect — the size of the footprints, the volume of water pouring into them, and the number of names on the panels — as if magnitude alone could endow it with sublimity. (firstthings.com)
For the spectacle and sheer magnitude of its natural beauty, Zion may be one of the most awe - inspiring wilderness preserves on the planet. (discovermagazine.com)