Sunglasses are important for several reasons. For the sake of adding chicness, as a means of accessorizing oneself, or curbing direct sunlight into eyes. It is surely tough to find sunglasses according to your eyes shape and size, the need of time (in terms of fashion), and design.  

This guide will help you all to know about the lens, size, and style of sunglasses. Also, it will assist in getting familiarize with what may or may not look good on you.  

Having said that, let’s start on basics and discuss the following aspects: 

  • Lens and material used in the lens  
  • Size of frame  
  • UV and types of rays  
  • The material used in making frames 

Lens – Types: Optical and Polycarbonate 

There are two types of lens used in glasses – optical and polycarbonate. Quality of these lenses is maintained by polished round glasses. They don’t seem to have distortions because of the same reason (maintenance is high and much more rewarding). Reliability and scratch-free are other features of the optical glass lens. Due to the fact that optical glass has more features and no downside, they tend to be expensive and costlier. 

The second type of lens of sunglasses is “polycarbonate”. These do justice with those who are always moving their grooves. Interestingly, the material used in the polycarbonate lens is just like that which is used in the making of planes’ windshield. So, naturally, they are simply very strong and imperishable. These are scratch-free and light which gives extremely clear vision and is more than half times better than an optical glass lens. However, there is one drawback. It gets scratches because it is not scratch proof. 

Size of frame  

What you look at in sunglasses before the purchase? Well, whatever you buy, we know that it is always a sunglass case that never goes ignored.  

First thing first, you will see the shape of the face. It is because structure gives an idea to what may suit or not suit. A tip that might help you is: smaller faces and shapes go with smaller frames and vice versa.  

Frames also give an edge to personality so the right fit is very important. Another thumb rule that will do justice to your face is about oversized frames. To support that, some known brands have started making bigger shades for smaller faces. Dimensions are something that could assist in choosing a frame. Information, where you can read or see the following specifications, are easy to select: 

  • Size of temple  
  • Size of eye  
  • Size of bridge  

What is temple size?  

Temple piece has a length too, obviously. Temple size is also termed as “earpiece” or “arm piece”. Mostly their lengths remain between 120 and 150 mm.  

What is eye size? 

Measured horizontally from the outer side of the edge, that goes towards inside to one of the lenses. Typically, the width of eye size is between 40 and 62 mm.  

What is bridge size?  

The bridge is the gap amid two lenses. The width of the bridge normally is between 14 and 24 mm.  

Materials used in making frames  

For some, it is not easy to select a new pair of glasses. They go all baffled and don’t understand the basics of choosing one. Mainly because they are not sure about a lot of things. And also, because they are not sure about functionality, its main purpose, comfort, safety, and other aspects. Obviously, materials play a vital role. They completely change looks, price, style, pros, and cons of sunglasses.  

Listed below are some basic materials that are used in sunglasses.  

  • Nylon  
  • Metal  
  • Plastic  

Let’s go into their brief explanations… 


If you are a sporty person then nylon frames would do complete justice. It will serve as the best one because of the following reasons: 

First of all, nylon is a material that works as an insulator. It easily drops and raises temperatures. They are relatively cheaper and more in demand than any other sunglasses. Besides that, nylon sunglasses are light in weight and reliable as compared to any old-fashioned metal frames.  


Metal is one of the most in-demand materials for sunglasses. Reason being sunglasses made out of metal have more resistance to corrosions, are easy to adjust, and are easy to fit according to the shape of eyes and face. They are also pretty stylish and come in different designs. They are a little expensive as compared to nylon ones. However, these are not very durable like nylon shades.  


Plastic is a third material that is widely used in famous brands and companies. Cheapest price wise with an array of designs, styles, and looks, these frames are considered best for kids.  

Last Verdict 

In short, it is easy to decide what to buy when one knows about frame material, frame sizes and rays that are eliminated to pass from lenses.  

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