is there any way to give the user (buyer) an option to select for instance a color or size of the product he is going to buy before he puts the product in to the shopping cart? This is a standard in webshops, and it is almost necessary because if you have a product in different sizes and colors and buyer has no option to select what he wants, then seller can only make a separate listing for each color and size, which is really unpractical and very confusing for the buyer.