These are neck specifications for all of out custom instruments.

Instrument Nut Width 12th Fret Width 1st Fret Thickness String Gauge String Height at 22nd Fret Neck Relief at 8th Fret
MC/1 1.66 in
42 mm
2.03 in
51.6 mm
.775 in
19.7 mm
.009 in
.042 mm
.060 in
1.5 mm
.012 in
.3 mm
DC/1 1.71 in
43.5 mm
2.09 in
53 mm
.820 in
20.9 mm
.009 in
.042 mm
.060 in
1.5 mm
.012 in
.3 mm
C-90 1.66 in
42 mm
2.03 in
51.6 mm
.775 in
19.7 mm
.009 in
.042 mm
.060 in
1.5 mm
.012 in
.3 mm
C-55 1.66 in
42 mm
2.03 in
51.6 mm
.775 in
19.7 mm
.009 in
.042 mm
.060 in
1.5 mm
.012 in
.3 mm
C-45 1.66 in
42 mm
2.03 in
51.6 mm
.775 in
19.7 mm
.009 in
.042 mm
.060 in
1.5 mm
.012 in
.3 mm
7-string
C-Series
1.885 in
48 mm
2.4 in
61 mm
.762 in
19.4 mm
.009 in
.060 mm
.060 in
1.5 mm
.012 in
.3 mm
4 String
Bass
1.61 in
41 mm
2.21 in
56.2 mm
.874 in
22.2 mm
.45 in
.100 mm
.086 in
2.2 mm
.025 in
.64 mm
5 String
Bass
1.72 in
44 mm
2.52 in
64 mm
.950 in
24.1 mm
.45 in
.130 mm
.086 in
2.2 mm
.025 in
.64 mm
P-5
Mandolin
1.2 in
30.6 mm
1.5 in
38 mm
.880 in
22.2 mm
.010 in
.034 mm
.048 in
1.2 mm
.008 in
.2 mm