Customers can use our prohibition signs to convey a message of prohibited acts. This could be to ask people to obey the no smoking, no photography, no entry, no exit or no dogs signs. Using a bold red circle with a diagonal red line across a clear icon to help translate a clear message.Stocksigns has a wide range of clear and effective selection of signs. All the signs in the range are available on various materials so your signs can suit your needs. They can be used in all environments including schools, retail and commercial or outdoor areas such as construction.