Adidas Originals. When in doubt, size up. Sizing System. XS 120cm 66cm 55cm 58cm. 2XL 55.1″ 29.9″ 23.6″ 24.8″. XL 53.5″ 29.1″ 23.2″ 24.4″. L 52.0″ 28.3″ 22.8″ 24.0″. M 50.4″ 27.6″ 22.4″ 23.6″.