I made a chair for practice so I thought I'd share the model here.
BLEND (Blender, filesize: 1 MB), OBJ (OBJ, filesize: 5.18 MB), FBX (Autodesk FBX, filesize: 2 MB), GLTF (glTF, filesize: 320 KB), ABC (Alembic, filesize: 250 KB), DAE (Collada, filesize: 701 KB), PLY (Ply, filesize: 12.2 MB), STL (Stereolithography, filesize: 3.63 MB)