Acoustic Guitar Back and Sides size guide:

Length x Width x Thickness (Millimetres  |  Inches)

Dreadnought:

Backs minimum sizing:

559mm x 210mm x 3.9mm | 22" x 8.5" x 0.155"

Sides minimum sizing:

813mm x 127mm x 3.3mm | 32" x 5" x 0.130"

 

Classical/OM:

Backs minimum sizing:

533mm x 197mm x 3.9mm | 21" x 7.75" x 0.155"

Sides minimum sizing:

762mm x 114mm x 3.3mm | 30" x 4.5" x 0.130"

 

Parlor:

Backs minimum sizing:

495mm x 172mm x 3.9mm | 19.5" x 6-3/4" x 0.155"

Sides minimum sizing:

711mm x 114mm x 3.3mm | 28" x 4.5" x 0.130"  

 

Weissenborn Guitar:

Backs minimum sizing:

800mm x 205mm x 3.9mm | 34" x 8" x 0.155"

Sides minimum sizing:

1060mm x 80mm x 3.3mm | 42" x 3.5" x 0.130"

 

Soprano Ukulele:

Back minimum dimensions:

267mm x 102mm | 10.5" x 4"  

Sides minimum dimensions:

394mm x 89mm | 15.5" x 3.5" 

 

Tenor Ukulele:

Back minimum dimensions:

311mm x 114mm | 12.5" x 4.5"  

Sides minimum dimensions:

508mm x 76mm |  20" x 3"