Again with the organisms whose sizes were formerly overestimated -- early estimates put Hainosaurus as high as 17 meters long. It's now been downscaled to 12.2 meters.
However, as the picture shows (12-meter Hainosaurus compared to 1.75-meter human) that's still very big.
Reference: Lindgren, Johan. The first record of Hainosaurus (Reptilia: Mosasauridae) from Sweden. Journal of Paleontology 2005 79: 1157-1165
