Image Width for Web Optimized Photos - custom input for image dimensions possible?

I would like to register a custom image width of 2048 px for web-optimized photos under Settings > My Company > General. However, the system only allows me to select predefined values such as 2000 px or 2100 px, and does not provide the option to enter a specific custom value. As I'm aligning my settings with HAR (Houston, Texas) recommendations, I would appreciate your guidance on how to proceed. Is there a way to manually input the exact width, or would you suggest an alternative approach? Thank you in advance for your support! Best regards, Gabriela