Glasses for a diamond face (cheekbones widest, narrow forehead and chin) need to be balanced by the shape of the frame. According to the 2023 world face fit study (sample size 300,000), diamond face accounted for about 12%, the most suitable for oval or cat eye frame (match rate 92%), the width of the frame should be 5%-10% wider than the cheekbone width (for example, cheekbone width 140mm, mirror width should choose 147-154mm). For example, Gentle Monster’s Myma series (oval frame, 150mm wide and 45mm high), which slim down cheekbones with a curve of the upper and lower rim, achieved 89% user satisfaction (52% for the ordinary model), a 65% repurchase rate (38% for the industry average), and a return rate of only 3.8% (21% for non-match models).
Technical parameters Optimize wearing effect:
Frame height: 45-50mm oval-shaped spectacles (e.g., Ray-Ban RB3447) can elongate the face, reduce the prominence of the cheekbones, and increase the “face balance” score by 37% in user tests.
Mirror leg design: Broad cheekbones must have an external expansion Angle of ≥5° (e.g., Dior SoReal, external expansion Angle of 7°) to prevent cheekbone compression, average daily wear time from 4 hours to 9 hours, comfort score from 6.2 to 8.9.
Material selection: Titanium alloy frame (bending strength ≥180MPa) weight ≤25g (for example, Lindberg Air Titanium Rim), which is 60% lighter than acetate fiber frame, and the long-term wearing sensitization rate dropped from 12% to 0.5%.
Market case verification design scientific:
Cat Eye style: Tom Ford FT5343 (top edge up 15°, bottom edge flat) By enlarging the top design (mirror width 152mm), make the forehead appear broader, diamond face users who purchased “face soft” score after purchase increased by 42%, leading this model’s annual sales of more than 500,000 pairs, with a gross profit margin of 68%.
Oversized oval shape: Chanel CC114 (lens height 48mm, width 148mm) utilizes gradient lenses (top 18%→ bottom 8%) to draw attention away from cheekbones, and the engagement level (likes + comments) of relevant Instagram posts is 22% (normal style 7%), and the brand’s annual revenue increases by $120 million.
Supporting value of economic data:
Unit price and return of the customer: The price of a frame that has a glasses for diamond face shape averages 180−400 (80−200 for a regular model), but with the low return rate (≤5%) and high re-purchase rate (55%), the profit growth of the brand on a per annum basis is 23% (McKinsey report). For example, Warby Parker’s custom service (based on 3D face scanning) retailed a single pair of frames that 45 to produce for 195, with a repurchase rate of 48% and an annual margin of profit at 58%.
Material cost-effectiveness: Titanium frames (i.e., Mykita Mylon) are 85 per pair and retail at 350, but due to durability (≥8 years of service life) and lightness (18g), the user’s yearly ownership expense is reduced from 50 (usual replacement frequency of 2 years/time) to 43.75.
Technological innovation to improve the adaptation accuracy:
3D face scanning: Luxottica AI algorithm (error ≤0.3mm) captures 14 facial parameters, and the recommended error between frame width and cheekbone width is less than 2%. For example, the user’s cheekbone width is 142mm, the system recommends the Persol PO3252S with lens width 148mm, the standard deviation of pressure distribution of the leg after wearing the mirror is reduced from 28Pa to 9Pa, and the comfort score is 8.7/10.
Virtual try-on functionalities: Amazon’s AR experience improves try-on conversion from 12% to 34%, click-through on diamond-face models (e.g., Oakley Holbrook) up to 18% (non-fit models 7%), and return rate down to 4.5%.
According to Euromonitor International, the market for eyeglasses for diamond-shaped faces will be 4.7 billion in 2023 (1,190 per return per year).