Ukulele

When holding as if to play:
Bottom String = 1
Top String = 4

1 = B
2 = F#
3 = D
4 = A

String 3 = middle D
String 2 = String 3 held at 4th fret. F#
String 1 = String 2 at 5th fret. B
String 4 = String 2 at 3rd fret.