I love these knobs. Each one is different, so expect the shape and appearance of the bubbles in the glass to vary a lot. The bubbles in some are centered, some are off to the side, some have tiny bubbles and others have a variety. I ordered enough that there were a few extras, however, I still had issues with several of the knobs being defective, and a couple missing from the order.  If you are in a hurry I would suggest ordering an extra box because quite a few of mine were defective (broken, crooked or globs of glue in the way so they won't sit flat on the cabinet). Wayfair customer service resolved all of those issues with no hassle, so I now have all of my new knobs in place, but it took a few weeks. I used a small bolt cutter in order to trim the excess length off of the bolts.