Could be 1/2 or 3/4 sorry I do not know enough about them to decide. I have pictured the sizes for you.
Cello 3/4 Size Hardwood Tuning Peg by J.Thibouville-Lamy - UK Seller
Fantastic Puerto Rico Matching Pair x 2 Vintage Hardwood Maracas Hand painted
Fantastic Matching Pair x 2 Vintage Hardwood Maracas
Cello String Shaft Tuning Pegs Tightening Repair Tool Wooden Handle Adjustment
VINTAGE Papps Tuning Wedge with Case for Piano Tuning (NO Spring)
Vintage Piano Tuning Key
