I just recently joined Guitar Tricks. I played (sort of) the guitar for years and just recently picked it up again. I find that my fingers have grown larger through the years. (I've worked with my hands for many years). I bought an electric guitar and I find that I am constantly muting strings when I'm playing chords because of big fingers. I asked a long time musician and owner of a music shop about guitars that maybe have a wider fretboard. He suggested that I buy an electric 12 string guitar and take off the octave strings because the fretboard is wider.
12 string electric guitars aren't just everywhere but I did find a lot on E-Bay. They ranged in price from $200.00 to thousands of dollars.
I'm not ready to buy another guitar but if I scrape up the money for another I plan to look into a 12 string electric.
I met some nice guys who own a guitar shop in Weatherford, TX and one of them has a 12 string Richenbacher for sale for over $2,000.00. If I was a better guitar player I might consider it but the guitar gods would probably strike me down if I took the octave strings off a 12 strung Rick.
An accoustic 12 string should have a wider fretboard and you might consider that.