I switched from thick acetate frames to a pair of thin titanium rounds about eighteen months ago, mostly because a friend in Apgujeong told me my old glasses made me look like I was “stuck in 2019.” She wasn’t wrong. The entire Korean eyewear landscape has shifted dramatically toward delicate metal frames, and once you understand why, you can’t unsee it — thin metal is everywhere on Seoul streets, in K-dramas, on idol fancams, and all over Korean fashion Instagram.
The Shift from Thick to Thin
Korea’s eyewear trends move in cycles, and the thick-frame era dominated from roughly 2015 to 2022. Chunky black acetate, oversized square shapes, bold tortoiseshell — these were the look, driven in part by Gentle Monster’s explosive rise and the celebrity endorsements that came with it. Those frames were statement pieces. They said “look at my glasses.”
The current thin metal trend says the opposite. These frames are meant to complement your face rather than dominate it. The shift aligns with a broader move in Korean fashion toward quiet luxury, understated elegance, and the “effortless” aesthetic that dominates Seoul street style right now. Big, loud accessories are out. Subtle, refined details are in.
K-drama styling has been a major accelerator. Shows like “Twenty-Five Twenty-One,” “Business Proposal,” and more recently “Lovely Runner” featured lead characters in delicate wire frames that sparked immediate consumer demand. When Kim Tae-ri wore those thin round titanium glasses in her drama, online searches for “김태리 안경” (Kim Tae-ri glasses) spiked 400% within a week.
The Korean Brands Leading the Movement
Gentle Monster (젠틀몬스터) remains the 800-pound gorilla of Korean eyewear, but even they’ve adapted. Their recent collections have included notably slimmer profiles compared to the chunky maximalism they were known for. Their “Dreamer” line features titanium frames with wire-thin temples that would have been unrecognizable as Gentle Monster five years ago. Prices range from 250,000 to 450,000 KRW ($185-335 USD). Their flagship stores in Gangnam and Hannam-dong are worth visiting just for the art installations, even if you don’t buy.
Projekt Produkt (프로젝트프로덕트) has emerged as arguably the most important Korean eyewear brand for the thin metal movement. Founded in 2015, they’ve built their entire identity around minimalist metal frames with subtle architectural details — a slight curve in the bridge, an unexpected hinge placement, a barely-there color accent. Their frames feel like they were designed by someone who studied both industrial design and anatomy. Prices sit around 180,000-320,000 KRW. Their GE series (round thin titanium) has been their best-seller for three consecutive seasons.
HAZE Collection (헤이즈 컬렉션) occupies a nice niche between fashion-forward and everyday wearable. Their thin metal frames incorporate slight vintage influences — think 1970s aviator shapes reimagined with modern Korean proportions. At 150,000-250,000 KRW, they’re slightly more accessible than Gentle Monster and offer excellent build quality. The “Evo” and “Aery” models are perpetually popular.
Fakeme (페이크미) has made a name with colored metal frames — rose gold, champagne, pale blue titanium finishes that add personality without the bulk of thick frames. Their marketing leans heavily into social media, and they’ve become a favorite among Korean fashion YouTubers and Instagram influencers. Prices are competitive at 120,000-200,000 KRW.
Muzik (뮤직) and CARIN (카린) round out the mid-range segment. Muzik offers clean, no-fuss thin metal frames at 100,000-180,000 KRW, while CARIN has built a strong following with their celebrity collaborations (Suzy and IU have been brand ambassadors). CARIN’s thin titanium “Moss” series is probably the single most-worn glasses frame I see on the streets of Gangnam.
Frame Shapes That Define the Trend
Round (원형) frames in thin metal are the purest expression of the current trend. Perfect circles in wire-thin titanium, often with minimal nose pads and straight temples. This shape works best on square or angular faces, softening strong jawlines. The John Lennon comparison is inevitable but Korean brands have refined the proportions — slightly larger diameter, more comfortable fit, better weight distribution.
Boston (보스턴) — a rounded square shape, slightly wider than tall — has become enormously popular because it flatters almost every face shape. It’s the safe choice if you’re unsure about going full round. Projekt Produkt’s Boston shapes are particularly well-proportioned.
Polygonal (다각형) frames — hexagons, octagons, and irregular geometric shapes — add an edge to thin metal. These read as more fashion-forward and work well for people who want the thinness of the metal trend but with more visual interest. Gentle Monster and Fakeme both do excellent polygonal designs.
Oval (오벌) shapes are having a comeback after being associated with grandparents for decades. In thin gold or silver metal, ovals look sophisticated rather than dated. They’re particularly popular among women in their late twenties to thirties — old enough to pull off the vintage reference, young enough to make it feel fresh.
Materials and What to Look For
Titanium (티타늄) is the king of thin metal eyewear. It’s roughly 40% lighter than steel, hypoallergenic, corrosion-resistant, and can be drawn incredibly thin without losing structural integrity. Pure titanium frames can weigh as little as 12-15 grams — you genuinely forget you’re wearing them. Most premium Korean eyewear brands use Japanese or Korean-produced titanium.
Beta-titanium (베타티타늄) is an alloy that’s even more flexible than pure titanium, making it ideal for temples (arms) that need to flex when you put glasses on and take them off. Many frames combine a pure titanium front with beta-titanium temples for the best of both worlds.
Stainless steel offers a similar thin aesthetic at a lower price point. It’s heavier than titanium but more affordable, and it’s what most budget-to-mid-range thin metal frames use. If you’re spending under 100,000 KRW, you’re almost certainly getting stainless steel rather than titanium.
Where to Shop in Seoul
Garosu-gil (가로수길) in Sinsa-dong is the epicenter of Korean eyewear shopping. Projekt Produkt, Gentle Monster, HAZE, and multiple multi-brand optical shops line this tree-lined street. You can try on frames from six different brands within a 10-minute walk. Most shops include basic single-vision lenses in the frame price, with progressive or blue-light-filtering lenses as add-ons (typically 30,000-80,000 KRW extra).
Namdaemun Market (남대문시장) is the budget alternative. The eyewear section on the 2nd and 3rd floors of the main building has hundreds of vendors selling frames at wholesale prices — you can find thin metal frames for 30,000-80,000 KRW including basic lenses. The brands are mostly unbranded Korean manufacturers, but the quality is surprisingly decent. Lens fitting takes about 30-60 minutes.
Hongdae has a growing cluster of independent optical shops catering to the university crowd, with curated selections of mid-range Korean brands at 80,000-180,000 KRW. The staff tend to be younger and more attuned to current trends, which helps if you want styling advice.
Fitting Tips Specific to Thin Metal Frames
Thin frames are less forgiving of poor fit than thick frames. A chunky acetate frame can be slightly too wide or too narrow and still look fine because the frame itself is the visual focus. With thin metal, the frame virtually disappears, putting your face proportions front and center.
Bridge fit is critical. Korean-made thin metal frames generally have higher nose bridges and differently angled nose pads compared to Western frames, reflecting Korean facial structure. This is actually an advantage for Asian faces — frames won’t slide down your nose constantly. If you have a lower nose bridge, look for frames with adjustable silicone nose pads rather than fixed saddle bridges.
Temple length matters more. Thin temples sit closer to your head than thick ones, so if they’re too long, the curve behind your ear will gap. Most Korean optical shops adjust temple curve for free at the time of purchase — make sure they do this, because out-of-the-box fit is rarely perfect.
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The best part about the thin metal trend? These frames are genuinely comfortable. After years of heavy acetate frames leaving red marks on my nose and dents behind my ears, switching to 14-gram titanium rounds felt like a revelation. My optician in Sinsa-dong actually laughed when I kept touching my face to check if I was still wearing them.
