ZHILEWrap Polarized Sunglasses Rectangular Metal Frame Classic Style Large Size

Are the metal frames, Bright silver?

Are these actually 5.9"? ordered a pair that were 5.6" and they didn't fit, yet they are good quality...

can these be used for presciption lens ?

I bought this glasses last year(grey) and loved them. Bought them again this year(also gray) and they were a completely different size, why is that?