The maximum width is overwritten by your active theme or one of the active plugins and it would require more custom work to get it showing as you would like to.
I recommend that you hire a front-end developer or a WPML contractor (https://wpml.org/contractors/) and they should be able to help you accomplish what you are planning.
I hope that you will find this information helpful.
Mihai Apetrei
This ticket is now closed. If you're a WPML client and need related help, please open a new support ticket.