KALDBAK Eyeglasses by Blackfin. Color: Dark Blue/Bright Blue, Dark Green/Light Green, Blue/White, Gray/Green, Black/Red, Black Gold/Blue, Size: 54-18-145. Stylish eyeglasses KALDBAK from Blackfin are crafted for those who seek minimalist design and maximum comfort. These frames offer a lightweight and durable construction, making them perfect for everyday wear. The KALDBAK is ideal for individuals who appreciate subtle sophistication.