And now the work begins! Be patient and careful. Your fish pieces should be approximately 5cm (2″) long, 3cm (1″) wide, and 1/2 or 1 cm (less than 1/2″) thick. If the fillet isn’t thick enough to get the width you’re looking for, slice diagonally. Don´t worry if you are not able to cut salmon into uniform pieces. You will get better after a little practice. You may even become a sushi master chef and break the record for the longest sushi roll in the world. (For now, according to the Guinness Book of World Records, the longest sushi roll was made in Russia on December 12, 2011 measuing 2,521.74 m!)