This is an eyeglasses frame from THE MASUNAGA, a brand of Masunaga Optical. Masunaga Optical is a traditional Japanese eyewear manufacturer founded in 1905. THE MASUNAGA is the high-end line of Masunaga Optical. It was conceived as the face of Masunaga Optical for the future, marking the company's 100th anniversary. This is a browline frame. Slits are incorporated into the titanium alloy hinges to reduce pressure on the head, providing a comfortable hold. Lens size: 53mm, Nose width: 18mm Please also check the profile.