Try "men's loose sweaters" on the Google, which gets pictures of what I think you're looking for.
Just make sure the description does not say "banded" or "cinched" or "tied." Loose fit is also a good one to look for. Is there a specific catalog you are looking at?
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Sweaters that don't cinch at the waist. You know, hang looser.
What do you call them for, say, online shopping?