Eriksen’s model results Published on December 10, 2014 in A Quarter Million Tons of Plastic Float in Our Oceans, says Dr. Marcus EriksenFull resolution ( × ) ← Previous Next → Eriksen’s model results for global count density in four size classes. (pieces km?2; see colorbar) for each of four size classes (0.33–1.00 mm, 1.01–4.75 mm, 4.76–200 mm, and >200 mm). Reference: doi:10.1371/journal.pone.0111913.g002