Minor Second: This interval comprises one tone (e.g., C to C#).
Major Second: Comprised of two tones (e.g., C to D).
Minor Third: Consists of three half-tones/semitones (e.g., C to Eb).
Major Third: Comprised of four semitones (e.g., C to E).
Perfect Fourth: Consists of five semitones (e.g., C to F).
Augmented Fourth/Diminished Fifth: Comprised of six semitones (e.g., C to F#).
Perfect Fifth: Consists of seven semitones (e.g., C to G).