The length of several very long dinosaurs are compared. Long-necked and tiny-headed, sauropods like the Brontosaurus are famed for their great size. I, DINOGUY2/MATT MARTYNIUK/WIKIMEDIA COMMONS
The word sauropod comes from the Greek for “lizard foot.” Once spread widely across the globe, sauropod fossils have been found on every single continent.
Long-necked and tiny-headed, sauropods like the Brontosaurus are famed for their great size. As well as the Brontosaurus, this group includes the Diplodocus and the Supersaurus. 
Sauropods include the largest terrestrial animals in history. Certain sauropods are estimated to have stretched some 130 feet long, while others stood as tall as 60 feet. The longest and tallest animals around today—the reticulated python and the giraffe—are tiny in comparison. The python measures up to 23 feet long, while a fully grown giraffe stands at around 18 feet tall.
The sauropods and theropods that left the footprints on Skye weren't quite so impressive—they stood about 6 feet 7 inches tall.

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The remarkable site sheds light on this important period in the history of dinosaurs. The prints were slightly older than others previously found on the island, extending the known time period for these dinosaurs on the island.
"This tracksite…demonstrates the presence of sauropods in this part of the world through a longer timescale than previously known," said Paige dePolo, a graduate student at the University of Edinburgh, who led the study. 
"This site is a useful building block for us to continue fleshing out a picture of what dinosaurs were like on Skye in the Middle Jurassic. The more we look on the Isle of Skye, the more dinosaur footprints we find," said Brusatte.
This article has been updated to include more information about sauropods.