$39 Illions Flag Pack 3D model by dragosburian. Available on CGTrader with 10000 polys and 10000 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 33.5 MB), OBJ (OBJ, filesize: 11 MB), FBX (Autodesk FBX, filesize: 54.1 MB), DAE (Collada, filesize: 12.3 MB), STL (Stereolithography, filesize: 3.12 MB)