The International Organization for Standardization provides the European standard for Safety footwear. The current one is ISO 20345:2011 – previously ISO 20345:2004.
The codes applicable to European safety footwear are:
There is also EN ISO 20346:2004 for protective footwear (must comply to basic safety requirements but toe cap impact resistance requirement is lower – 100 Joules) & EN ISO 20347:2004 for Occupational Footwear (must comply to basic safety requirements with anti static or slip resistant properties. This standard does not require a protective toe cap)