Senseless, 10 months ago

There are several:

• DIN EN ISO 12 625-4: 2005 (Dry tear resistance and perforation resistance)
• DIN EN ISO 12 625-5:2005 (wet tear resistance)
• DIN EN ISO 12 625 -9:2005 (Puncture resistance)
• DIN EN ISO 12 625-3:2005 (Paper thickness in use)
• EN ISO 12 625-8:2004 (Water retention capacity)

Yet there seems to be no standard for the size or number of sheets in a roll.