What kind of clothes should a size 12?

It depends on the shape of your body, your individual tastes, age and the type of environment you work in.

For example, many women who are 'pear shaped', meaning they carry the most waist in their lower half- specifically hips, butt and thighs- usually wear A-line skirts and boot cut jeans in order to balance out their figures. I am a size 12 and pear shaped.

You should discover what type of shape you have, and then adjust the clothing you find in your size according to the other factors I mentioned above.

Size 12s are usually found in most major clothing stores, however some clothing lines are more generous in their cut, like GAP for example. In other lines, you may find yourself bumped up to wearing a size 14, especially if you are curvy in your lower half. I hope this helped!