Bob Cut Unit. Options come in neck length (8-10”) and Shoulder length (12-14”). Lustress Hair Co.’s Bob Cut Unit with 4x4 and 5x5 Ultra Thin HD Lace is the ultimate choice for a sleek, natural look. This timeless bob cut comes in two options: neck length (8-10”) and Shoulder length (12-14”). This unit was designed for effortless elegance, with a sharp, chic finish that frames the face beautifully. The Ultra Thin HD lace melts seamlessly into the scalp, creating an undetectable hairline and allowing for easy, versatile styling. Lightweight and breathable, this unit offers the perfect balance of style and comfort, making it ideal for anyone seeking a polished, professional look with minimal upkeep.