Felix Schlang did some calculations of the weight of the ring segments with the Serial number one starship which is using 4 millimeter thick steel. These segments weigh 1622 kilograms. They are less than one-third of the thickness of steel used for the Starshopper. The optimized Starship will have some sections where steel is half as thick at 2 millimeters. These would weigh 810 kilograms.
There are about 15 of the 1.82 meter tall rings on a SpaceX starship. This would mean the outer hull steel would weigh about 15-20 tons.
The Super Heavy booster is taller than the Starship. It would weigh about 20-25 tons for the outer hull. There may need to be some heat shield in some spots and there is all of the internal full tanks, bulk heads and other material.
There is a rendering picture below by Kimi Talvitie and another from @Fael097.
Videos by Felix Schlang at What About It
Brian Wang is a prolific business-oriented writer of emerging and disruptive technologies. He is known for insightful articles that combine business and technical analysis that catches the attention of the general public and is also useful for those in the industries. He is the sole author and writer of nextbigfuture.com, the top online science blog. He is also involved in angel investing and raising funds for breakthrough technology startup companies.
He gave the recent keynote presentation at Monte Jade event with a talk entitled the Future for You.  He gave an annual update on molecular nanotechnology at Singularity University on nanotechnology, gave a TEDX talk on energy, and advises USC ASTE 527 (advanced space projects program). He has been interviewed for radio, professional organizations. podcasts and corporate events. He was recently interviewed by the radio program Steel on Steel on satellites and high altitude balloons that will track all movement in many parts of the USA.
He fundraises for various high impact technology companies and has worked in computer technology, insurance, healthcare and with corporate finance.
He has substantial familiarity with a broad range of breakthrough technologies like age reversal and antiaging, quantum computers, artificial intelligence, ocean tech,  agtech, nuclear fission, advanced nuclear fission, space propulsion, satellites, imaging, molecular nanotechnology, biotechnology, medicine, blockchain, crypto and many other areas.