Most lengths of hair can form an updo style, accented by barrettes and clips. The right accessory can be found for almost any hair type!
The most common type of clip used in updos is the butterfly style, a metal or plastic item that clenches in on itself. Pinch together the "back" parts in order to open the clip, upon which it will resemble a butterfly with spread wings. The springs will hold it closed over your hair when you let go. Butterfly clips are very commonplace and usually plain in design, though some are more decorated. Because of their size and the clamp mechanism they are suitable for all hair types and lengths past the shoulder.
Another common accessory is called a "clamp". These are seen in a lot of Asian hairstyles and are medium-length to long clips that taper at one end and open by pressing down on the other. They generally come in two sizes, the standard of which is about four inches long and the smaller about two inches, both types of which work well in curly hair. Very long or thick hair does not usually work well with clamps, especially the smaller variety, but with the use of two at once to secure the hair diagonally, even very long tresses can be contained. Use a looser bun while styling with clamps and consider adding bobby pins or other small clips to prevent them from shifting.
Mini claw clips are great for short or curly-haired updos. Simply twist a small amount of the hair up and secure it at the scalp with one of these--they are also often decorated to look like butterflies. You may need to use a great many, or to secure several pieces using one clip in order to keep this hairstyle in place.
Though not barrettes per se, hair sticks (or chopsticks) will also nicely accessorize and hold an updo. Simply twist the entirely of your hair around the stick and secure it to the back of your head, either vertically or at an angle. A second hair stick will keep it in place. This is a great look for curly hair!
Crab clips--small and teardrop-shaped--will accent an updo while keeping bangs and flyaway strands at bay. Use them in combination with other accessories to create your desired look and secure your hair in place.
Don't be discouraged if a barrette doesn't work well in your hair--your style will be affected by the length and texture of your tresses. Keep experimenting until you find something that works well for you.
