That way, you can make sure the straightener you're buying can actually reach your desired heat without short-circuiting. Temperature setting: Last but not least, you should know the temperature setting that's best for your hair.Typically, if your hair is easy to straighten, a ceramic straightener is the way to go, while a titanium straightener is ideal if your hair is coarse and more resilient to pressing. Plate type: Once you identify the size you need, ask yourself whether you're a ceramic or titanium straightener stan.Looking to perfect your bangs? There are ultra-thin half-inch straighteners out there for precision styling. If you have longer hair, consider 1.25 to two-inch irons. For short to shoulder-length hair, one-inch plates are usually the way to go. Plate size: Length matters when it comes to shopping for flat irons.