user12270: There are many questions regarding the 2D chess sets here, but I couldn't find any questions regarding 3D chess sets.
I couldn't find any free or paid 3D chess set on the internet
The following chess pieces set is from chess,com. so I think I can't use it in my chess project.

So is there any source where I can find any 3D chess sets (Free or Paid)?

user21513: Lichess uses these 3D pieces:
https://github.com/clarkerubber/Staunton-Pieces
The repository contains renders in various styles and resolutions as lossless PNGs, as well as the original 3D files.
Available under a MIT License
example:
https://github.com/clarkerubber/Staunton-Pieces/blob/master/Renders/Basic/Scaled/Black-King.png

Or in wood, as your examples:


12270: <p>There are many questions regarding the 2D chess sets here, but I couldn't find any questions regarding 3D chess sets.</p>
<p>I couldn't find any free or paid 3D chess set on the internet</p>
<p>The following chess pieces set is from chess,com. so I think I can't use it in my chess project.</p>
<img src="https://i.stack.imgur.com/mWK5Q.jpg" width="500">
<p>So is there any source where I can find any 3D chess sets (Free or Paid)?</p>
 21513: <p>Lichess uses these 3D pieces:</p>
<p><a href="https://github.com/clarkerubber/Staunton-Pieces" rel="nofollow noreferrer">https://github.com/clarkerubber/Staunton-Pieces</a></p>
<p>The repository contains renders in various styles and resolutions as lossless PNGs, as well as the original 3D files.</p>
<p>Available under a MIT License</p>
<p>example:
<a href="https://github.com/clarkerubber/Staunton-Pieces/blob/master/Renders/Basic/Scaled/Black-King.png" rel="nofollow noreferrer">https://github.com/clarkerubber/Staunton-Pieces/blob/master/Renders/Basic/Scaled/Black-King.png</a></p>
<p><a href="https://i.stack.imgur.com/bn35C.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bn35C.png" alt="black king" /></a></p>
<p>Or in wood, as your examples:</p>
<p><a href="https://i.stack.imgur.com/tYQax.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tYQax.png" alt="black king wood" /></a></p>
