Braided sleeves are tubular in shape, made in a braiding process. As a rule of thumb, the diameter will expand/contract ±30%. Handy formulas for determining your needs are:
Radius = ½ Diameter
Circumference = 3.1416 x Diameter
As the braid shortens in length, diameter increases as does the hoop strength but the bending strength decreases. The reverse is also true; as the braid stretches the diameter decreases the hoop strength decreases and the bending strength increases. This also affects the quantity you will need for your project.
The following sleeve options are available:

Fiberglass	Aramid	Carbon