Masunaga 050 c19
Masunaga 050 c19
Masunaga 050 c19

Masunaga 050 c19

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Color: Solid black acetate square frame
Size: 56–18–150 B = 41 mm ED = 56 mm
Material: Full acetate

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The 050 C19 is a bold, square frame made from solid black acetate with a strong, structured silhouette. It features a subtle keyhole bridge and thick acetate temples for a balanced, confident look. With its larger 56 mm lens width and clean lines, this frame delivers a striking presence while maintaining Masunaga’s signature comfort and craftsmanship.

All sizing is listed in millimetres (mm) and follows the same convention.

The first number is the A measurement, or the widest width of the lens, regardless of the plastic or metal around it. It’s strictly the lens.

The second number is the smallest distance between lenses, or DBL. This is commonly referred to as the bridge.

The last number is the length of the temple itself. Extra measurements given are the B measurement, which measures the largest vertical depth of the frame and the ED, or effective diameter, which measures the widest straight line you can make on the frame. Oftentimes this is the same as the A measurement. Like the A measurement, both the B and ED are strictly measurements of the lens and not the plastic or metal surrounding the frame. 

For example,

54-18-135, B=38, ED=56

- This frame’s widest horizontal measurement is 54 mm.

- The bridge is 18 mm and the temple length is 135 mm.

- The deepest portion of the lens is 38 mm

- The widest straight line you can make on it is 56 mm

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