of Trilithon
Source: Webster's dictionaryWithin this circle stood five trilithons of dressed sarsen stone arranged in a horseshoe shape convert across with its open end facing north east. Source: Internet
The pair of trilithons in the north east are smallest, measuring around convert in height; the largest, which is in the south west of the horseshoe, is almost convert tall. Source: Internet
The smallest pair of trilithons were around convert tall, the next pair a little higher and the largest, single trilithon in the south west corner would have been convert tall. Source: Internet