Features: Clips on glasses into sunglasses(not suitable for glasses which bridge is very thickness). Transforms regular glasses into sunglasses. Attaches onto existing prescription or fashion glasses. Great for those who already have a pair of prescription glasses and do not want to spend more for a pair of prescription sunglasses. Descriptions: Perfect companion for driving, outdoor sports, fishing, traveling. It will also be a great gift for your friends and family. Convenient one hand application to prescription frames with positive indexing lens positions. Specifications: Eyewear Type: Sunglasses Style: Goggle Frame Material: Alloy Gender: unisex Suitable people: Adult Lens Material: PC UV: 400 Single Lens length: Small 55mm, Big 60mm Lens Height: Small 34mm, Big 37mm Bridge length: 15mm Total lens length: Small 128mm, Big 135mm Package included: 1 x Clip On Glasses Lens Note: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. The color of the actual items may slightly vary from the above images due to different computer screen, thanks for your understanding.