The other lengths mentioned would be considered customized. The above represents Thames' standard measurements. However, they can be customized to suit an individual's needs. Also, the neck thickness at 1st and 12th fret, as well as neck shape, can be customized. The standard dimensions, unless otherwise specified, are 22mm at the nut and 25mm at the 12th fret.
Experience shows that players seem to prefer the more well-rounded neck shape.
I like guitars with a quick response, brilliant trebles and basses that are clear but also create an ambiance of character. My guitars are full and rich and open. My instruments are known for their projection. The coloration is more, I feel, in the range of volume as well as different textures of sound. By this, I mean the ability to drive the instrument to get more sound out as well as playing it softly and having the instrument project so that there is a range of volume as well as texture of sound.