CLASSICAL Guitar Chord Buddy Learning System w/True Tune Clip-on Chromatic Tuner for Nylon-String, Wide-Neck Classic Guitars This version is for CLASSICAL (wide neck) guitars only. This unit does not work on standard neck widths of 1 7/8" and thinner, 12-string or fractional size guitars. Please MEASURE your guitar neck before ordering. Measure across the neck of your guitar at the nut (the white bar between where your fingers are placed and the tuning knobs). If the width is more than 1 7/8, you have a classical guitar. from the nut to the 3rd fret should be approximately 4. If these two measurements are as noted, the ChordBuddy should work just fine. Included lesson plan and companion DVD will have you playing popular songs in no time. Extremely quick progression with a proven, effective, all-in-one system, suitable for all ages. Start playing from the minute you attach the Chord Buddy to your guitar. Includes a True Tune TT-05 chromatic tuner!