Import multiple values from csv into custom field with predefined options

Hi,

I have a csv file for import and I have a custom field with predefined options to select from. Let’s say I have a custom field with options like “big”, “small”, “blue” and “red”.

Can I import two or more options into this field if I have the date in my csv like “big, blue” or “small, red”? Does it work using csv or using xml is mandatory in that case?

Thank you in advance!