Add quantities to the cart separately

Hi All,



When a customer orders a certain quantity of an item (for example) “Item A”. And then adds more quantity it just adds it together when I would need it on a seperate line.



For example… I have clothing which comes in different sizes. Medium and small.



How do I go about so the items go on seperate lines in the cart.



I.E: Customer adds to cart 3 quantity of item A (In Medium) and then adds 2 Quantity of Item A in Small.



In the cart it just shows 5 quantity. How would I place these on seperate lines so it shows the different quantities on different lines.



Kind Regards,

Ian