Prohibition Sign - Universal Symbol for "No" or "Not Allowed" #1663638 (License: Personal Use)

This image displays the internationally recognized prohibition symbol-a solid red circle crossed by a diagonal red line from upper left to lower right-set against a black background for maximum contrast and visibility. The design follows ISO 3864-1 standards for safety signage, ensuring immediate recognition across cultures and languages. It conveys absolute restriction, commonly applied to banned behaviors like smoking, entry, parking, or use of devices.

Used in regulatory signage, digital interfaces, safety manuals, and legal documentation to communicate prohibitions clearly and unambiguously; matches user intent seeking visual confirmation of “no” or “not allowed” symbols for compliance, design, or educational purposes.