Grand Concert Orchestra Model Body Sizes

[audiosoul]

Is one larger or deeper than the other? Or is it just the body shape that is different?...

[Augustwest2012]

From Martin's website:

O
Total Length 37 3/4"
Body Length 19 1/8"
Body Width 13 1/2"
Body Depth 4 1/16"

O Tenor
Total Length 35 1/4"
Body Length 17 1/8"
Body Width 13 9/16"
Body Depth 4"

OO THIN BODY
Total Length 38 5/8"
Body Length 18 7/8"
Body Width 14 5/16"
Body Depth 3 1/4"

OO
Total Length 38 5/8" 37 3/4"
Body Length 18 7/8" 19 5/8"
Body Width 14 5/16" 14 1/8"
Body Depth 4 1/8" 4 1/16"

OO DEEP BODY
Total Length 38 5/8"
Body Length 18 7/8"
Body Width 14 5/16"
Body Depth 4 5/8"

OOO (also OM)
Total Length 39 13/16" 39 5/8"
Body Length 19 3/8" 20 9/16"
Body Width 15" 15"
Body Depth 4 1/8" 4 1/8"

Grand Performance
Total Length 40 3/8"
Body Length 19 3/4"
Body Width 15 3/4"
Body Depth 4 1/2"

OOOO (also M)
Total Length 40 5/8"
Body Length 20 1/8"
Body Width 16"
Body Depth 4 1/8"

D
Total Length 40 1/2" 41 3/4" 39 7/8"
Body Length 20" 20" 21"
Body Width 15 5/8" 15 5/8" 15 5/8"
Body Depth 4 7/8" 4 7/8" 4 7/8"

J
Total Length 40 5/8" 41 7/8"
Body Length 20 1/8" 20 1/8"
Body Width 16" 16"
Body Depth 4 7/8" 4 7/8"

[sdelsolray]

Originally Posted by audiosoul

Is one larger or deeper than the other? Or is it just the body shape that is different?...

Depends on the luthier, particularly for Grand Concert models. OM models' measurements are more uniform from builder to builder. In comparing the two, the body shapes are certainly different. As to body depth, again, it depends.

[jseth]

I don't know that there is a "standard" for the measurements; many folks just work off the measurements of a Martin OM for their OM-style guitars...

I know that James Goodall's OM, OOO and Grand Concert guitars all have the SAME dimensions... on the body, at least.