I need a square shape frame with pure black colour for my uncle. Where can i order this kind of eyeglasses frames?

The better is that plastic material is TR-90. It is said high quality flexible plastic eyeglasses (TR-90) with the spring hinges temples will help wearers to adjust to fit their face comfortably. Those kinds of eyeglasses frames collected multicolor and crystal material, which will attract children eyes. It is available with any color or shape you want.

Any answers is well, thanks a lot.