They fit perfectly as the original ones did that came with my sunglasses, however even though they look the same as the ones I replaced, when looking though them it's not a darkened tint effect but instead a bright yellow hue. While they may offer UV protection my main goal was to replace my scratched lenses with similar lenses that darken the sun rays. Price is good, build quality is good, fit is good so I'm giving 4 stars.