The SJ at  Heinonen Guitars is based directly on the Olson SJ. It is such a great body shape; I felt very honored when Jim gave me permission to make dimensional drawings off of his templates. Listed are the general standard specs of the SJ (see Pricing for more options):

• A true flattop Western Red Cedar (species variable)
  
• Scale length: 25.34"
• 14 frets to the body
• Nut width: 1.75"
• Saddle spacing: 2 5/16"
• Ebony fretboard
• Ebony headstock faceplate
• Ebony bridge
• Waverly tuners
• Unbleached bone nut
• Unbleached bone saddle
• Upper bout dimension:11 1/8"
• Waist dimension: 9 1/4"
• Lower bout dimension:15 1/16"
• Body depth at neck: 3 3/4"
• Body depth at tail: 4 3/4"
• Body length: 19 3/8"