Quantity depending on model, size & color

Hi! I am setting my t-shirt store.
Let's say I have 3 model shirts - A, B and C.

COLOR

A - white, navy blue
B - light blue, black, navy blue
C - light gray, navy blue, black

SIZE

A_white - XL, M
A_navy_blue - XX, XL
B_light_blue - M, L, XL, etc....

You got the idea.
On top of that, every size has different shirts in stock.

How do I configure that?
Since it is not possible (I dont know how! :) to link attributes,
do you think I should have all colors and all sizes with their
respective values, for every model, and mark the ones that don't exist as "not available" or "out of stock"?

Thank you!

Plamen K.
https://www.witnessgraphics.org

Stock-by-attributes is not a default feature of the current Zen Cart.

There is a module in the downloads/other section for stock-by-attributes by kuroi that you might try