As its name suggests, the Taylor Big Baby is a larger version of the increasingly popular 3/4-size Baby Taylor "travel" guitar. The Big Baby has the neck, the Dreadnought shape, and the arched sapele-veneer back and sides and solid spruce top of the regular Baby, but in a body size that's roughly 15/16ths of a full-size Taylor.
The Taylor Big Baby has the 25 1/2" fret scale of a full-size guitar, so its strings are at normal tension and the top is large enough to produce a complete acoustic guitar tone, albeit one that's sweeter and smaller than a full-size Taylor Dreadnought. The development of the Baby Taylor led Bob to develop the "new tech" necks, whose design and methodology in turn made the Big Baby possible.