Three Key Frame Dimensions
Three printed numbers on the inner temple define frame fit, marked in format: Lens Width □ Bridge Width - Temple Length.
1. Lens Width
Horizontal width of single lens. Standard adult: 48–55mm; oversized fashion frames: 56–60mm.
2. Bridge Width
Distance between two lenses over nose, standard 16–20mm. Wider bridge for high nose, narrow bridge for low nose.
3. Temple Length
Full length from frame hinge to ear tip, common adult range: 140–150mm.
How to get your accurate size
Check the inner arm of your existing comfy glasses. New frames with lens/bridge within ±2mm error & temple within ±3mm will fit well.
Frame Selection by Face Shape
- Round Face (soft curves, equal length & width): Go for rectangular/slim square frames to lengthen facial proportion; avoid full round frames.
- Square Face (sharp jawline, prominent angular cheek): Pick rounded/oval frames to soften hard facial lines; skip heavy sharp-square frames.
- Heart Face (wide forehead, narrow pointed chin): Choose aviator & cat-eye frames with wider bottom rim to balance slim jaw; avoid extra-wide top-heavy oversized frames.
- Oval Face (balanced proportional features): All frame shapes work freely based on your styling preference.