I didn't know what I didn't know when it came to buying a lamp shade. The floor lamp I was buying it for didn't have a shade, so I didn't know exactly what I needed to buy. I had done some research online, then found lampsusa.
I chatted with their online help, and they were VERY helpful in pointing me towards what I needed/wanted (I needed a drop spider to sit on an 8" bowl). There were plenty of choices. I got the fabric and color I wanted.
The rest of the purchase was just as easy. The shade arrived quickly and was well packaged.
I'm very satisfied. I highly recommend using their online help chat if you're not sure what you need.