Manufacturer: ACME
ASIN: B00CQK62AE
approx. 28mm or 1 - 1/8 inch when measured from the center of the hole in the minute hand to the tip.
For modern cuckoo clocks which use the brass bushing in the minute hand (included)
Will not fit older style cuckoo clocks which used a square hole in the minute hand itself
If your clock hands are missing, measure from the hand shaft to the outer edge of the III to determine the length you need.