According to EN 12163, EN12165, EN12166, EN 13601 etc.

Round bar (drawn) : 3,5 – 50,8 mm

Round bar (extruded) : 20 – 200 mm

Square bar (drawn) : 4 – 50 mm

Square bar (extruded) : 40 – 130 mm

Hexagon bar : 6 – 36 mm

Flat bar (extruded) : 30×25 – 200×80 mm

Flat bar (drawn) : 22×1,4 – 160×10