If total front width is the measurement you need and the listing only gives three frame numbers, ask for it. Guessing from lens width or the size of a product photograph can create a misleading comparison. A short, specific question helps the store understand what information would actually help you.
Identify the measurement you mean
Say that you are asking about the complete outside front width, not the width of one lens opening. Include the exact model and selected size. A model with several sizes needs a size-specific answer.
If you have a measurement from your current frame, explain how it was taken. Measurements using different endpoints should not be compared as if they were identical.
Send a question the store can answer
A useful message is: “I am comparing this model in this size with my current pair. Is the total outside front width available, and how is it measured?” Add the color if there are product-specific details to confirm.
You do not need to send your prescription or a face photo just to ask whether a frame dimension is available. Use the normal private contact route for the question.
Leave an unanswered measurement unanswered
The store may need to check the information or may not have a verified figure. Do not replace an unavailable number with arithmetic from the lens and bridge markings.
If the measurement is essential to your decision, wait for the answer or get fitting help before purchasing. A clear unknown is more useful than a precise-looking guess when you cannot try the frame on.
Use a specific frame for your comparison
Open the exact model and selected size when you investigate a fit question. These Fast Eyeglasses listings give you concrete options to compare with your own reference pair.
- View Tycoon frame details — listed sizes: 52–20–140 or 54–20–145 or 56–20–150.
- View Alana frame details — listed sizes: 55–17–140.
Frame sizes describe lens width, bridge width and arm length. Check current options and availability on the product page. Ask about any important measurement that is missing.