The sweep I bought is too small

Thanks for writing in! There is a chance that one of our shower door sweeps could work to replace your sweep. I'll just need to know the shape of the top of your original sweep, if you still have it to use as a reference. I am looking to see if it is a T-shape or a rounded shape. 

To be quite honest, you might want to consider replacing both the sweep and the drip rail altogether. That said, our 10-326 might be worth considering as a replacement. The rail curves down unlike yours however I believe it should still work as a replacement. Keep in mind, you may need to drill new installation holes to install this. Take a look and see what you think.

Measurement of the end of the shower rail to the installation screw hole.