First thing to do is measure the length and width of your shower. Not many are the exact same measurements.
Once you have your measuring done, find a piece of fabric you really like that fits your measurements.
(You don't want a really dark fabric because it will be fairly dark when in the shower.)
(You need to remember a curtain liner. If you don't have one your fabric will always be wet and start to get moldy.)
Measure out the top hooks from the liner and see how far apart they are then puncture a small hole.(No bigger than the size of a dime) It was easy for me, I simple placed a hole on every blue square.
Finally, you slip the holes with through the liner hooks and make sure they are secure.