Check out Medival Round Wooden Shield Low-poly 3D model on CGTrader for $5. High-quality mesh by akila-kumara: 403 polys, 414 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 797 KB), OTHER (Other, filesize: 4.35 MB), GLTF (glTF, filesize: 23.6 MB), FBX (Autodesk FBX, filesize: 721 KB)