Lycett saddles as fitted to Ariels came in 2 sizes. The standard size, which is the smaller of the two, fits everything other than pushrod Square Fours (ie 1937 - onward Square Fours). These Square Fours had a larger, wider saddle. I do not think that the owners of Square Fours necessarily have bigger backsides than other Ariel owners. I think the reason for the wider saddle is that the rear frame rails on the pushrod Square are further apart than on the other models to cope with the wider engine.
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.