I ordered 55lbs of shelf rock and was planning on making some of the more usual shelf scapes you see on here/google. But my 55lbs arrived in 4 large slabs, albeit I requested larger 10-16 inch pieces (I just didn’t think they’d weigh so much) so I rolled with it and I’m happy. I know it doesn’t give fish the greatest of cover but it’ll be more reef than fish. Stax rocks came in clutch and a nice alternative to the more expensive foundation pieces although you do have to balance carefully before gluing/epoxying.