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Double Bass Grading Specifications:
AAA
Knots and knot shadow are not allowed within the pattern area. Grain is straight and even or graduated. minimal to no runout. Generally white in colour. Tops by log number are available.
AA
Knots and knot shadow fall outside the pattern area. Grain may be uneven, wavy, or curved. Slight colour variation allowed. Slight runout allowed. Tops by log number are available.
A
Knots and knot shadow fall within the pattern area. Brown and orange colour allowed. Specific log numbers cannot be requested.
Instrument Billet Size Chart:
All measurements are for each half of the billet size. For one piece tops, double the width.
| Instrument | Length | Width | Spine | Length | Width | Spine | |
|---|---|---|---|---|---|---|---|
| Violin | 406 mm | 114 mm | 25 mm | 16" | 4.5" | 1" | |
| Viola | 482 mm | 139 mm | 31 mm | 19" | 5.5" | 1.25" | |
| Cello | 812 mm | 228 mm | 38 mm | 32" | 9" | 1.5" | |
| Double Bass 4/4 | 1220 mm | 355 mm | 64 mm | 48" | 14" | 2.5" | |
| Double Bass 3/4 | 1220 mm | 342 mm | 64 mm | 48" | 13.5" | 2.5" | |
| Double Bass 5/8 | 1168 mm | 304 mm | 50 mm | 46" | 12" | 2" | |
| Archtop Guitar | 558 mm | 228 mm | 31 mm | 22" | 9" | 1.25" | |
| Dreadnought Guitar | 558 mm | 228 mm | 5 mm | 22" | 9" | 0.2" | |
| OM/000 Guitar | 482 mm | 203 mm | 5 mm | 19" | 8" | 0.2" | |
| Parlor/0 Guitar | 482 mm | 177 mm | 4 mm | 19" | 7" | 0.2" | |
| Baritone Ukulele | 355 mm | 127 mm | 4 mm | 14" | 5" | 0.2" | |
| Tenor Ukulele | 304 mm | 114 mm | 4 mm | 12" | 4.5" | 0.2" | |
| Concert Ukulele | 279 mm | 101 mm | 4 mm | 11" | 4" | 0.2" | |
| Arched Mandolin | 406 mm | 203 mm | 25 mm | 16" | 8" | 1" | |
| Flat Mandolin | 355 mm | 127 mm | 4 mm | 14" | 5" | 0.2" |
