I’m not an expert, but have raised and slaughtered both pigs and cattle. A pig generally reaches a market weight of around 230 pounds. After this weight they tend to put on less weight per pound of feed, and become less efficient meat producers. The cattle I raised were slaughtered at around 1200 pounds.
Obviously, there’s a lot more hide on a cow. As a individual, I would boil and scrape the hog, but I assume commercial producers would skin it.
You could make coats and such out of pigskin by sewing together multiple skins, cause what the hell, they make mink coats, and those guys are tiny, but I figure it’s a lot easier to just use cowhide commercially. Pigskin clothing is available though, I just now googled some up. Nice coat, and at 572 euros it ought to be.