SmartFlip Fit-Tech Guide: fit, clip-ons, and comfort
SmartFlip pairs spring hinges with metal builds to keep pressure light through daily movement, while included clip-on sun lenses turn clear specs into shades in a snap. Live inventory skews full-rim rectangular and oval, plus a half-rim rectangular option; lens widths run from small 42 mm up to ~51 mm. Neutral finishes like matte black, brown, sand, and dark blue keep styling easy. ModaFrames is an authorized retailer.
How sizing and clip-ons work
Use the three numbers on each frame as your compass: lens width – bridge – temple (for example, 50–17–140). Aim to center your pupils horizontally; temples should reach without bowing. Clip-ons should cover the lens edges without touching your cheeks. If you are between sizes, start smaller for better optical alignment and test the bridge feel after a few minutes.
| Build & shape |
Size notes |
Hinges |
Clip-ons |
Best for |
Returns |
| Metal, full-rim rectangular |
Typical 50–51 mm lens |
Spring |
Included |
Workdays, commuting, screen time |
30 days, new/unused; buyer pays return shipping |
| Metal, full-rim oval |
About 49 mm lens |
Spring |
Included |
Softer lines, narrow faces |
30 days, new/unused; buyer pays return shipping |
| Metal, half-rim rectangular |
Around 48 mm lens |
Spring |
Included |
Light feel, reading focus |
30 days, new/unused; buyer pays return shipping |
| Metal, small rectangular |
Compact 42 mm lens |
Spring |
Included |
Petite fit, tighter PD ranges |
30 days, new/unused; buyer pays return shipping |
“Two-in-one convenience with a calm, secure fit—like flipping a switch when the sun comes out.”
Next steps
Value hunters can start with our Eyeglasses under $30. Unsure which silhouette suits you? Explore our Face shape guide. Free US shipping is included, and you will receive tracking after fulfillment. Returns are straightforward—review the Returns and refund policy. Checkout is SSL-secured and supports major cards and wallets.
Frequently Asked Questions
Are clip-on sun lenses included with SmartFlip frames?
Yes. SmartFlip frames ship with a matched clip-on set designed to fit the specific shape. The clip-on attaches and releases quickly without scratching the frame when used properly. Check the product photos to see the clip tint and hardware. For the cleanest look, align the top bar first, then release to lock.
Do the clip-ons block UV and are they polarized?
All clip-ons provide tinted sun coverage; polarization can vary by model. If you drive frequently or deal with water glare, choose polarized when available. Review the specs on each product page, and if polarization is a must-have, consider our dedicated polarized roundups. Compare features and tints before you decide.
What do numbers like 50–17–140 mean on the listing?
They are lens width, bridge width, and temple length in millimeters. Small lenses sit around 42–49 mm, medium 50–54 mm. Start from a frame you already own and match within 1–2 mm where possible. If your pupils sit wide, try a slightly larger bridge or frames with more frontal width for balance.
How do spring hinges change the fit for wider heads?
Spring hinges flex outward to reduce temple pinch and bounce back to shape after daily on-off cycles. They help keep the frame feeling steady without squeezing. If you often get pressure near the ears, a spring-hinge build plus a slightly longer temple can improve comfort. Check the hinge type and temple length in specs.
Half-rim vs full-rim: which should I choose?
Half-rim designs feel lighter and can draw attention away from the lower rim line—great for reading or a minimalist look. Full-rim provides a sturdy outline and classic profile that holds its shape well. If you are hard on glasses, start with full-rim; if you want a lighter visual weight, try half-rim first.
Will my optician install prescription lenses in these frames?
Yes. Frames arrive with demo lenses; your optician will fit your prescription. Bring your PD and lens preferences (single vision, progressives, blue light, etc.). For best results, match frame size to your current pair and confirm bridge comfort after a short wear test before ordering custom lenses.
How do shipping and returns work for SmartFlip?
We offer free US shipping and send tracking details once your order is fulfilled. Returns are accepted within 30 days for new, unused items; original shipping is non-refundable where applicable, and return postage is typically paid by the buyer. To proceed confidently, review the full returns policy and keep original packaging.
