OK so the Wyrd Miniatures web site is in error? It does look like a 40mm base in the photo.
https://wyrd-games.net/shop/Flesh-Construct.html
Flesh Construct
32mm 'heroic' scale high quality metal cast miniature. All miniatures supplied unpainted. May require preparation and assembly. Provided with one 50mm plastic round base.
Sculptor: Stefan Niehues
Concept: Stephan Enjorlas
Painter: Jessica Rich