[quote name='PauBass' timestamp='1367817885' post='2069687'] 
Try a Fender Geddy Lee, the neck is very slim and easy to play, I haven't tried any other bass that has such a thin neck. 
[/quote] 
The Fender Jaguar bass necks are the same as the Geddy's. 
My MIM '01 Jazz necks are even slimmer than the Geddy's. I think they were like that till around '06.