What do you suggest I can wear?

[glass frame]

I am planning to buy a pair of fashion pink eyeglasses frame, as it is really a fashionable color in my mind, by the way, my name is Susan, a 21 years old college student, and I need flower design on the frame legs, here is my Rx:
OD:-6.25 OS:--5.50
And I need another pair of prescription sunglasses, Is it hard to fabricate if I choose plastic frames as my Rx is too strong? The optician told me so, but I cannot quite believe it!