https://www.cgtrader.com/3d-print-models/fashion/other/bowser-knuckles-cosplay-anime
Bowser Knuckles, dimensions: 2.80 x 5.62 x 6.38in or 71.20 x 142.85 x 161.94mm
Solid and Split files available. Intended and scaled for cosplay or display purposes.
If you need help with the files or scaling to a different size let me know.