Hey Ed-
I just happen to have these handy: 20th Anniversary 5-string (so a 4 will be a bit less wide):
body @ widest point = 15
crown headstock @ widest = 5.875
overall lenght = 49
FYI - because of the angled headstock and length of the headstock, it will NOT fit in a standard Levys 50 bag (leather). I tried!
Opinion of the bass: It's an Alembic!! I've had mine since 1990, it was my first, and I love it. The only tone better I've found is my Series basses. If the one you're looking at is the Maple version, it is very bright - there's nothing but Maple and Purpleheart in them.
good luck!!
C-Ya...........wayne