Comment by Dr4kn
New Glenn has a payload size that is comparable to that of starship.
Falcon Heavy can launch much heavier stuff than 9, but it uses the same fairing. If you want to launch things that can't fit into Falcon 9s fairing, then your only options are SLS, New Glenn and in a few years Starship.
Especially Space Station Parts and Spy satellites can be quite huge. So there is an established and growing market for larger payloads
The extended Falcon fairing was spotted recently on one of the Falcon launches at the Cape. They are designing that for DoD payloads I think but it's advertised as available for payloads. It's not any wider but it is 18.7 m tall instead of 13.2m. Source: [Falcon User Guide](https://www.spacex.com/media/falcon-users-guide-2021-09.pdf)