What the numbers on your glasses mean
Lens width, bridge and temple length are a starting point—not a complete fit check.
Read the three common measurements
A marking such as 53–21–145 commonly refers to lens width, bridge size and temple length in millimetres. The exact notation can vary. These are product dimensions, not a measurement of your face or a guarantee that another frame with the same numbers will feel identical.
Why total width is different
The overall front includes more than the two lens openings and the marked bridge size. Rim design, endpieces and curvature also matter. Do not calculate total front width using only twice the lens width plus bridge size. Use the manufacturer’s verified overall width when it is available.
Materials and bridge design change the feel
An acetate bridge and adjustable nose pads can distribute contact differently. Temple shape, frame weight and lens weight can also affect comfort. A lighter-looking frame is not necessarily the best fit for every person.
Use your current pair as a reference
Bring glasses you enjoy wearing and explain what works or bothers you. We can compare their markings and fit with new options. An on-screen image helps you explore style; an in-store fitting checks how the actual frame sits.
General information, not an individual diagnosis or prescription. Product suitability and availability are checked in store.