Marc Jacobs Calfskin Leather Shoulder Bag — Brown. Composition: 100% Calf Leather Bos Taurus. Exterior material: Calfskin Leather. Measurements: 26.5 × 14 × 4 cm (10.4″ × 5.5″ × 1.6″). Strap: Leather Strap. Closure: Zip. Carry: Shoulder. Adjustable strap. Detachable strap.