Remember, you do not want to wear anything that would draw more attention to your nose. Try looking for a frame that is not embellished with gems because this will draw more attention to your nose. A wraparound frame to be would be a good fit for someone with a big nose because it draws more attention to the eyes and hair.
To make your nose look smaller, you can try oversized sunglasses which can make your nose look smaller. Besides, you'd better choose sunglasses with wide bridges distance between the lower part of lenses like Rayban. Maybe that sunglasses will works. Just try on and test it out by yourself. Try on some sunglasses in sunglasses stores and find the best suitable one that matches your face shape.
if you have a big nose, some very large sunglasses are ones you can set your hands on, like square shaped ones or rectangle shaped ones.at present, large sunglasses are quite hot among women and men. they have become chic fashion items that can flatter wearers' faces. so have a try at some very big sunglasses, and they will draw attention from your big nose and make you look great. good luck.