This model is a 3D print ready Ha'Tak Mothership from the Stargate series, it includes a .obj version for direct printing at a preset size of 6' wide, 5.68' long, and 2.12' tall, but also has the .blend file if you wish to resize it to your specifications.
OBJ (OBJ, filesize: 1.17 MB), BLEND (Blender, filesize: 1.92 MB)