Attibutes - Two in one Roll; One in Another

Ok. I have a question about the layout of Attributes.
I have several different attributes that will consist of having many options.

I would like to have the basic attributes (size & material) side by side in one roll, then have the other attributes set up as one per roll because there will be many options with images in those and the options with images will take up the space below.

Example:

(Roll #1) Size: Dropdown Material: Dropdown

(Roll #2) Attribute #3 Dropdown
(X represents an image)
X X X X X X X X X X X X X X

(Roll #3) Attribute #4 Dropdown
X X X X X X X X X X X X X X

and so on...

if anyone could help or post a link where this is shown I would appreciate this very much.

Kat