If you go to EF's glass toys page, there are categories for the different textures. Check out the smoother toys and see if there's anything you like there.

My first glass dildo I picked out from a brick and mortar sex store run by a really friendly, educational woman. She took the glass toys out of their packages so I could hold them in my hands and feel the texture and weight. I ended up picking one that was ribbed on one end and bumpy on the other. I didn't care much for the bumps, but the ribs were nice. If you're not sure what you want, you can either look around the site and analyze the reviews, or maybe pop over to the closest store. If there's something you find that you like, but it's kind of pricey, you can always come back on EF and see if they have it for cheaper. Happy hunting!