Most 3D models on CGTrader are computer-generated (CG) 3D models, which are used in animation, design, art, engineering, architecture, medicine, VR/AR, game development and similar fields, but we do have some printable 3D models too.
Printable 3D models can be found by pressing this link or using the drop-down menu at the top of the page:
Once you visit a 3D print model page, you will usually see other indicators, showing that model the model is printable: