One Day Internationals - Miscellaneous Records and Statistics - Number of Balls per Over in each Country
While now standardised at 6, in some countries the number of balls bowled per over fluctuated between 6 and 8 during the first 20 years of One Day Internationals. At times the number of balls varied in different countries even in the same time period.
The table below shows the number of balls per over for each country at different times for those countries which have deviated from the standard 6 ball over.
Australia
Period BPO
1970-71 to 30/06/1979 8
Since 01/07/1979 6
 
New Zealand
Period BPO
1972-73 to 30/06/1979 8
Since 01/07/1979 6
 
Pakistan
Period BPO
1976-77 to 30/06/1978 8
Since 01/07/1978 6