High-G: the traditional ukulele sound
High-G uses G4. The G string is higher than the C string, creating re-entrant tuning and the bright, compact sound many people recognize as ukulele.
Low-G: a wider, linear range
Low-G uses G3. The strings then rise in pitch from G to C to E to A, which feels more natural for scale runs, fingerstyle arrangements, and lower melodies.
Which should a beginner choose?
Stay with the strings already fitted to your instrument while learning the basics. Choose High-G for the classic sound or Low-G when you want deeper melody notes and more range.
Do not tune a High-G string down to Low-G
A High-G string becomes too loose when dropped an octave. Use a string made for Low-G and confirm that it suits your ukulele and bridge.