In the perfume and fragrance department of Migros, the comparison prices for fragrances are not uniform. Some products are labeled with 100ml = CHF ... . For some other products, however, it says 10ml = CHF ...

This seems rather arbitrary to me. And confusing. It makes it difficult to compare prices because you have to look very carefully and, if necessary, convert the comparison price.

Couldn't we agree on a standard unit of measurement? So always 10ml or always 100ml? Or what is the reason for the current regulation?