How to write elegantly if you are prohibited from going to a large size?

The following three elegant expressions can be used in this situation:

1. Euphemistic expression: Use polite and euphemistic language to express the prohibition of going to the big size. For example, you can say: "Please note that the use of the bathroom is prohibited here."

2. Clear instructions: Use clear instructive language to express the prohibition of going to the bathroom. For example, you can say "Please leave the bathroom."

3. Sign reminder: Post signs in relevant places or areas to remind people that bathing is prohibited.