Part to mount wooden leg to a tabletop. Leg 23mm x 46 mm, but you can download step file and modify the dimensions.

Onshape link to model:

https://cad.onshape.com/documents/b12954736c16258fcd525baa/w/47ad8cec7266d03233c90e47/e/c43f1e92d27b1c854ab9d2c2?renderMode=0&uiState=69517a9c8382508f39c702b4