A different shape from British broadsheets
Eleven by twenty-two inches is 279 by 559mm, which makes it narrower and slightly taller than Newspaper Club's traditional broadsheet at 380 by 578mm. The proportions are noticeably different: this is a tall, narrow page where the British format is broad. A layout designed for one looks wrong on the other, and not in a way that scaling will fix.
The narrowness is the thing to plan around. Ten inches of printable width is the same as the 11 by 17 tabloid, so you get no extra room across the page at all. Everything you gain is vertical. That suits long columns of text and tall photographs, and it is awkward for wide images or anything that wants to run across the full spread.
The one printable area published directly
MakeMyNewspaper states the printable area of this format outright as 10 by 21 inches, rather than leaving you to subtract the margin yourself. That is a small thing but a useful one, because it removes any doubt about whether the half inch rule applies to all four edges here. It does.
It also gives an external check on every other figure on this site. The dataset behind these pages derives printable areas from trim size and margin rules, and this format is where that derivation can be tested against a number the printer published. It matches, which is a reasonable reason to trust the ones that were not published.
Practical considerations at this size
A 22 inch page is long. It does not fit in most home scanners, it is awkward on a desk, and postage moves into a different bracket. None of that is a reason to avoid it, but all of it is worth knowing before the delivery arrives.
For content, the vertical space rewards long form writing and full height photographs. If your material is a series of short pieces with a picture each, a tabloid will present it better, because on a page this tall short items either float in white space or get stacked so densely they stop being readable.