A different look, a familiar fit
Choosing a Second Pair of Glasses: Fit Before the COUPON20 Code
A second pair can look different while still meeting the same wearer’s prescription and comfort needs. Use your current comfortable frame as a starting point, then compare the actual dimensions and design.
By the Fast Eyeglasses team · October 21, 2026
Read the markings before browsing
Frame size markings may be on the temple arms or bridge, and the complete size can be split across locations. The numbers commonly describe lens width, bridge width and temple length in millimeters. Record the full markings rather than relying on a single number.
A matching number does not guarantee the same fit. Overall width, bridge design, frame shape and the way the temples sit all matter. Our temple-length and fit guide helps explain why arm length is only part of the comparison.
Change the style deliberately
If your first pair is angular, explore a rounder shape without assuming a shape label determines the fit. The round-glasses collection and rectangle-glasses collection give you two different starting points. Compare each listed size with the pair you already find comfortable.
The women’s frame collection can be another browsing route, but a category is not a substitute for measurements. Pick for the wearer’s actual fit, the intended prescription and the style they want to use.
Keep the lens purpose clear
Choose the prescription for the intended task. Do not assume a reading prescription is an all-purpose distance prescription or guess changes to your numbers to make a frame work. Ask the prescriber if the intended use is unclear.
For a second pair used at work, identify any actual protection requirements before shopping. The prescription safety collection is separate from an ordinary style comparison; confirm the exact configuration and workplace requirements rather than treating any backup as protective eyewear.
Look at the full two-pair quote
Everyday complete pairs start at $79 with standard single vision lenses. Two $79 base pairs are $142.20 after a $15.80 qualifying second-pair saving, before applicable tax or additional charges. Upgrades can change the eligible pair prices, while prescription-strength charges are excluded from the discount.
COUPON20 applies to one lowest-priced eligible complete pair when two or more are ordered together. It is not 20% off the entire purchase. The cost calculator helps explore options; checkout shows the actual order total.
Resolve fit questions before ordering
Current online checkout uses one prescription per order. Contact us before buying for different prescriptions or wearers. Check the full product details and custom-order policy, because a customer-selected fit or change of mind does not qualify for a return.
When the pair arrives, follow the supplied care instructions and resolve discomfort or fit concerns before relying on it as your backup. The useful second pair is the one you can comfortably wear for its prescribed purpose, not simply the one with the most different shape.
Put this guide to work
Compare the relevant frames and ordering details before choosing your pair.