Best way to display a sub sub menu

I have a product database working fine.

Products are assigned a main category and a sub category.

What I need to add are product options so the 'rosary beads' sub category will have colour options...red, black, white etc...

I'm wondering what is the best way to do this? A separate 'options' table with the id from the product table?

So the table would be something like...

id   option
13  red
13  black
13  white
14  large
14  medium
14  small
Screen-shot-2012-03-30-at-18.13..png