*Above: The Great Trilithon, centre-right in the image above, was the largest of the 5 trilithons. Just one upright remains. The other upright lies broken on the ground, alongside the fallen lintel (image © David Fowler)*

10 m – the original length of the fallen upright from the Great Trilithon (Stone 55).

9 m – the approximate length of the tallest stone still standing, the remaining upright of the Great Trilithon (Stone 56).

7 m – the height this upright reaches above ground.

2.4 m – the depth this same stone reaches below ground.

35 tonnes – the weight of the largest sarsen stones.

5-6 metres – the average length of the sarsen trilithon lintels.

5 metres – the average height of the uprights of the sarsen circle.

20 tonnes – the average weight of these uprights.

3 metres – the average length of the sarsen circle lintels.

3 tonnes – the weight of the largest bluestones.

40 tonnes – the weight of the heel stone.

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