Access clothing matrix

Hi
I am trying to develop an Access database for a clothing department.
Does anybody know how i would go about including or setting up a matrix for Size and colour.
I have a range of fashion products which each have a product code say 556762 but need to add on particular sizes and colours of the product.
I then need to run a report to give me the breadown of this.
Don’t know why i got lnded with this one…I’m a bloody network guy….Thanks