From Schott Zwiesel, the Era Collection Double-old Fashion Glasses, Set of 4 features: Crafted from patented, lead-free Tritan® crystal for enhanced durability and sparkling clarity, this set of double-old fashion glasses made in Germany of regionally-sourced materials.  Set of 4 glasses Tritan® glass crystal Era Collection Brilliant clarity Break resistant Dishwasher safe Measures 3.5" x 3.5" Capacity 12-oz. Imported.