The phrase "a massive length" is correct and usable in written English.
It can be used to describe something that is significantly long, often in contexts related to measurements, distances, or descriptions of objects.
Example: "The cable was a massive length, making it difficult to store properly."
Alternatives: "a considerable length" or "an extensive length."
Tall, dark and exceedingly handsome with a rich mahogany coat, ebony mane and tail, a striking white blaze that defines an attractive head, and gleaming white stockings marking three of his powerful legs, Union Rags glides over the ground like a male runway model with a massive length of stride, his perfectly proportioned parts moving in synchronized locomotion.
"It's a massive amount of money and a massive length of time.
Pasting a massive length of text into IRC is bad practice, akin to suddenly shouting over everyone else in a conversation.
As we walked pass a massive length of train-track strewn to the side of a hill I was told of how a riotous group uprooted these tracks with their bare hands in an act of mob fervor while being shot at by the police.
Despite its massive length, it's a fast read.
Jonathan Littell's The Kindly Ones reprises the familiar atrocities, in graphic detail and at massive length, from the viewpoint of an SS officer intimately involved in their execution.
Hugo, with his technique of massive length, refuses to hide it at all.
Because of the massive length of the health care battle, the pro-health care reform forces, have simply been outgunned on TV by the big insurance companies and the Chamber of Commerce (mainly funded by the big insurance companies) that have pockets of infinite depth.
The giant flag of a Russian bear unfolded across a massive stand the length of a touchline was an impressive feat of co-ordination, but it wasn't particularly scary.
I even added a 2X teleconverter to bring the effective focal length to a massive 640 mm!
If you look at more recent videos on his channel, you'll notice a sharp increase in video length and a massive decrease in views.
