Product variants can be very useful, even essential for certain types of products. However, we recommend that you use them sparingly. Indeed, offering too many options can quickly make your product page too full and therefore the decision-making process of your clients too complicated.
Let's take the example of the skirt again. Offering two options (colors and sizes) seems coherent, the client understands very quickly that different colors are offered, and the choice of the size seems obvious in the context of selling clothing.
On the other hand, if this model of skirt also existed in different materials, we should have included an additional option called "MATERIAL" with the variants "LEATHER", "TULLE" and "SILK". This would have greatly increased the choice of options for our clients.