According to the 2023 Global Eyewear Market report, the width of the average small face women’s lenses is 50 mm, which is 7.4 percent narrower than that of the standard sunglasses (54 mm). The mirror leg length is controlled in the range of 135-140 mm (the regular model is 145-150 mm), and the nose bracket spacing is reduced from 17 mm to 14.5 mm, suitable for people whose face width is less than 138 mm. For example, the “Junior Series” of Ray-Ban engineers the overall frame width to 128 mm, widens the angle of curvature at the tip of the leg to 25° (18° for the standard model), enlarges the contact area behind the ear by 32%, and reduces the peak pressure to 0.15MPa (0.28MPa for the standard model).
Regarding material innovation, a 2024 Journal of Materials Engineering study demonstrated that the proportion of β-titanium alloy used in small-face models was 43%, and its yield strength was 800MPa at the same time, its weight only 2.3 g/cm ³, 48% lighter than stainless steel. Japanese brand JINS ‘Petite Air’ series uses 0.3mm honeycomb hollow mirror legs, the weight of the entire frame is reduced to 19 grams, the opening and closing life of the hinge is over 25,000 times (industry standard 18,000 times). As for the American Academy of Ophthalmology, the deviation of such sunglasses small face women’s lenses’ optical center should be regulated within ±1.5 mm, and the 8-base curved aspherical lens can decrease the distortion of field of view by 23%, and the edge thickness of the lens can be decreased from 4.2 mm to 3.1 mm.
The difference in design is expressed as the facial golden ratio reconstruction. Persol’s Mini Frame line of Italian high-end eyewear extends the look of the face by elevating the point of focus of the eye by 9 mm above the cheekbone (normally 120-130 mm wide) with an aspect ratio of the lens being 0.62 (0.55 for standard models). 2023 Amazon sales figures show that the click rate of narrow frame models inset with diameter ≤2 mm micro-diamond decoration is 67% higher, and the return rate dropped from 22% to 9%. Korean Gentle Monster’s “Small Face Lab” project 3D scanned 32,000 Asian women and found that when the frame height is less than 40mm, the comfort value is 4.8/5, and when the style height is more than 45mm, the value is reduced to only 3.7.
On the price strategy front, the mass production cost of professional small face models is 18-22% higher than that of conventional models. Rakuten statistics of Japanese online shopping platform show that Sharp developed the “intelligent fine-tuning nose bracket” patent technology (support 0.1mm adjustment) to make the product 35% high-end, but the re-purchase rate increased to 41%. Chinese brand BOLON’s “Linglong series” has reduced the delivery cycle from 28 days to 14 days through modular production, improved the accuracy of opening of the mirror frame to ±0.05 mm, and the durability test of the mirror leg spring hinge shows that the variation of performance is < 3% in the temperature range of -20 ° C to 60 ° C, which drives the category’s annual growth rate to 29%, more than twice the industry average of 12%.