Do you want to sell Shoe, T-Shirt online, etc… You need to be able to control stock for Virtuemart simple attributes. When the admin creates a product will be able to set all its different attributes: color, size , stock and price adjustment. Each product will have a unique stock number. So, in the back-end, You need to be able to control the stock. In the front-end, if the user buys a specific size/colour of the product, automatically the stock of the product for that size/colour will be deduct.
Our product available for Joomla 1.5, 2.x, 3.x and Virtuemart 1.x, Virtuemart 2.x and Virtuemart 3.x
Please check bellow video for more details