All the Lothian Olympians with Eastern Coach Works bodies are of  '10.2 metre' length, 33 feet 7 inches long, with a wheelbase of 18 feet 6 inches. They are of the European standard 2.5 metre bus width,  8 feet 2½  inches. All have full-height bodywork. I have been informed that the 'full-height' ECW bodywork is 14 feet 2 inches high, not 14 feet 6 inches. This was to cater for large potential customers, such as the former West Midlands, centred on Birmingham, who had standardized on this height in the 1970s. 

The first two Lothian Olympians, 666 and 667, were of the much more common '9.5 metre' length, 31 feet 4 inches long.  They had Alexander R type bodies, and 667 has been preserved. The later Olympians also have Alexander R type bodies but are of 10.2 metre length, the same as the ECW ones. The R type bodies are 14 feet 5½ inches high. They tend to look higher anyway, because of the very upright front and rear ends and more sloping upper deck sides. 

To tell a low ECW Olympian from a high one, apart from noticing the height:

1. The low bodywork has equal-depth windows on upper and lower decks. On the high bodywork the lower-deck windows are deeper.

 2. The low bodywork has an extra panel strap horizontally all the way round, about one third of the way up between the top of the lower-deck windows and the bottom of the upper-deck windows. The high bodywork just has a deep plain side panel between decks.