The question that most often stops an online purchase is always the same: what if they do not fit? It is a fair question. The nice thing is that the answer is already written, inside the temple of the glasses you are wearing now.
Inside the left temple
If you have your glasses at hand, you can turn the left temple toward the light and look for a sequence like 49□22 140. Almost every frame in the world has it printed. Those are your measurements, and they work with any brand.
What each number says
The first is the lens width: the width of one lens in millimetres. The higher it is, the wider the glasses are horizontally. Below 48 we are in small sizes, above 54 in oversize.
The second, after the little square, is the bridge: the space between the two lenses, meaning how much room is left for your nose. It is the number that decides whether the glasses slide down or leave a mark.
The third is the temple length, from the hinge to the tip. It is usually between 135 and 145 millimetres.
The sum that really matters
Lens width plus bridge tells you how wide the front is in the part that rests on your face. If your current pair is 49□22, the sum is 71: a 52□18 pair makes 70 and will fit you in a similar way, even if the lenses look different. That is why two frames with different numbers can fit the same.
And if you do not have a pair to look at?
You can use the configurator to try on the glasses virtually and change the measurements on the fly, so you can be sure your glasses will be just right.
The advantage of buying from the person who makes them
In ordinary shops you choose among the sizes that are there. In my workshop the frame is born in the right size for you. Every model in the catalogue is available on request in other sizes and colors.
If you have your numbers at hand, you can send them to me here. If instead you are passing through Positano, it is even simpler: I can help you with the right measurements myself.