Quantity for product characteristics

Hello

Is it possible to set a quantity for product characteristics
Lets say i sell a red t-shirt in 3 sizes (L, M, S) like you do in demo
Now it would be fantastic if the Quantity could be set for each size.
Size
- L --> 10 pc
- M --> 5 pc
- S --> 3 pc
Quantity total = 18 pc

Ok there might be a problem if you would like to add now a color too, there needs to be an subcharacteristic in the characteristic
- blue
-- L --> 10 pc
-- M --> 5 pc
-- S --> 3 pc
- red
-- L --> 5 pc
-- M --> 5 pc
-- S --> 7 pc
Quantity Total 35 pc

If this is possible this would be a great feature, or ist there a workaround to achieve this

Ok, for the first question i found the solution already

After adding the characteristic to the product, there is the button manage characteristic
clicking on that opens a new combined product, where settings can be changed

is there a way for the secound question (color and size)