Pixie braids are basically box braids with various length but end differently with a bend. They are burnt at the ends and bent slightly to give them a shape going towards your face. When bending the ends it is creating a bob like look. You can also have layers with the braids if you make the top braids shorter then the ones at the bottom.
the style pixie
Other then braids pixie is an actual hair cut that women get. Its something like the pixie braids but instead its a shorter look. This hairstyle usually fits women who have a diamond, heart-shaped, oval, or square shaped face. This picture of Rihanna is her rocking the pixie hair cut. So basically think of the braids as a sassy look for women,
These ladies are wearing the classic bob look. Their braids stop at their neck or a little higher and they all have the bend.
When getting your pixies long they will still create a bob like style. Everything is still the same even down to the bend at the end. The only difference is they're long.