Available in 5 sizes:

4/4 size = scale length 68.5 cm (standard size)
3/4 size = scale length 62.2 cm
1/2 size = length 58.6 cm
1/4 size = length 52.3 cm
1/8 size = length 46.0 cm

a - aluminum on steel core, ground
d - aluminum on steel core, ground
G - aluminum on steel core, ground
C - aluminum on a steel core, ground