Prohibition Sign - Universal Symbol for "No" or "Forbidden" #3381407 (License: Personal Use)

The image displays a standard prohibition sign: a bold red circle with a diagonal red line from upper left to lower right, set against a transparent background. This design follows ISO 3864-1 standards for safety signage and is widely used in traffic, workplace, and public environments to communicate restrictions clearly and instantly. Its high contrast and simplicity ensure cross-cultural recognition.

Commonly used on websites, apps, signage, and documentation to denote banned actions (e.g., no smoking, no entry, no photography). Matches user intent for understanding restrictions, compliance, accessibility warnings, or UI feedback for invalid operations.