Oily skin tends to be shiny, and has larger pores. Oily skin is prone to blackheads and blemishes.
Normal / combination skin type has medium pores, a smooth texture, good circulation and healthy color. This skin type tends toward dryness, especially on the cheeks. But in the T-zone, it tends to be oily.
Dry skin has a rough and dehydrated texture, fine lines and wrinkles are much more visible.
As for sensitive skin type, the pores tend to be smaller. The skin blushes easily, the capillaries are easily broken. The skin is frequently allergic and can sometimes lead to rashes.