I just purchased a SBMM Ray34QM Neptune Blue new for a great price.The Nut width is 1.5" [38mm] and 9 1/2 Radius. I am not sure why the standard finish Ray34 and KOA model has a wider neck,[43mm] could be they discontinued the Ray34CA which had 38mm neck and these Quilted Maple models give buyers the smaller neck choice but with 3 band eq and contoured body? I prefer a wider neck even though I have smallish hands. But not complaining this is a great Bass for $799 Street price. It came set up perfectly Action, neck, pickup height and Intonation all spot on,[by EBMM SETUP INFO] this was very unexpected. The smaller neck has its advantages but I am having to get use to the smaller string spacing; mainly on Slap and Pop. Also I noticed Head stock now Shows 'Stingray' not Ray34, This I like also. It is nice to look at beautiful finish. On the NET dealers have inaccurate specs most show 43mm nut width and some even have radius at 12".