Micro rings (also known as beads) have been very popular and used for the attaching and applying stick-tipped hair extensions. They have been used in the past because of their minimal sizes. The nano rings have come to beat them in this regard. They are 3mm in diameter and are 2.5mm inner diameter. Which makes them 90% smaller than traditional micro rings. They are used to harness the hair extensions with the nano tips. They are usually not detectable and are very strong, and long lasting.