I sized mine up like others shown in the comments. Used multi-color for the body and glow in the dark filament for the ball and it came out great. Made it for my nephew who is all about these fidget toys and adding a glow in the dark element to it added another layer of fun.

This model came out great. I am very late in rating this but the maker was very responsive when I asked what filament was used to replicate the picture shown. However, it was not available in the US but I will link the ones he sent me as well as the listing for the filament I used. https://amzn.eu/d/02iQ7A3N https://amzn.eu/d/04NSzwJm https://www.amazon.com/dp/B0CPHVGT26/ref=dp_iou_view_item?ie=UTF8&th=1