These unique kinetic glasses “wobble” or “swirl” depending on your mood! Each is one is unique, although sets of 4 similar size and shape are available. You can view a video of them in action here (https://mollyjoburke.squarespace.com/#/woblet/). The texture on the exterior of the class provides some lovely optics on the table. Dimensions (HxWXD): 4.25” x 4” x 4”