Premier Dealers usually have our gear in stock and available to ship immediately. Acoustic Guitar Shapes
00, Concert or Grand Concert - C.F. Martin & Company (aka Martin Guitars) set the standard for identifying guitar sizes by number. These numerical descriptions are sometimes used by others. 
Sizes begin at 5 (the smallest) and go up to 0000 for a Grand Auditorium (nearly as large as a Dreadnought). A 00 size guitar is smaller than a 000. which is smaller than a 0000. The number system does not include Dreadnought or Jumbo models. Some of these guitars have 12-frets above the body instead of the 14 found on other models and on larger instruments. So, even though the term Concert or Grand Concert may bring to mind a large bodied guitar, you now know it's actually more compact than the Dreadnought or Jumbo. This style provides great tonal response across the bass, mid, and treble ranges with reasonable sustain.
000, Auditorium or Grand Auditorium 
- Despite it's spacious name, this style tends to have a slimmer waist than the Dreadnought and a slightly smaller body. The result is a guitar that some find easier to handle, with a sound that emphasizes the mid and treble ranges.
Folk, Classic - This is the hardest group to list in the acoustic guitar guide because models referred to as Folk or Classic are available in a variety of sizes. They are usually built to produce tones across the spectrum with reasonable volume and sustain, and are often available in a cut-away version with built-in electronics for amplifying sound.
Orchestra Model aka "OM" 
- Originally developed by Martin by shortening the body of their 000 model. (The Martin OM later became the Martin 000, so today's OM's are based on the original.) The Martin OM was one of the first mass produced guitars with 14 frets above the body. Though originally designed for classical players, it quickly gained popularity among cowboy and bluegrass performers.
Dreadnought - The most popular body sold. 
A large body guitar producing booming lower and mid-range tones, as well as great sustain and volume. Due to the size of this instrument, it may not be a good choice for smaller framed beginners. It is, however, very popular for it's sound, especially among country and western performers.
Jumbo 
- Yes, it really is a larger bodied guitar, producing great power in the lower ranges, as well as great sustain and volume. Again, this may not be the right guitar for a beginner, or small framed player.
Credit: Acoustic Guitar Guide
