The food inlet (feed tube/throat) on a #22 meat grinder is typically about 2.25–2.5 inches (57–63 mm) in diameter.
The meat outlet size depends on the grinding plate installed.
The included plates appear to be approximately 6 mm (1/4") and 8 mm (5/16") hole sizes.
So, the feed opening is about 2.5 inches wide, while the ground meat exits through the selected plate holes.
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By vevor