Terminology Bloom: 150 × 150 mm2 to 250 × 250 mm2. Billet: 50 × 50 mm2 to 125 × 125 mm2. Slab: thickness, 50 − 150 mm; width, 0.6 − 1.5 m. Sheet and plate: max thickness, 6.35 mm. Foil: 1.5 mm thickness.