Well, AFAIK, slick tyres are sized in the following way.....

The first number is the width. They tend to be more of an accurate width than a road tyre. So, 190 = 190mm wide.

The second number is the overall diameter. So, 580 = 580mm diameter. A 195/45/15 is around 570mm diameter.

The third number is obviously the rim size. i.e. 15 or 16.

I don't think you will get anything close to the sizes that you state there though.