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 
197071 to 30/06/1979 
8 
Since 01/07/1979 
6 

New Zealand 
Period 
BPO 
197273 to 30/06/1979 
8 
Since 01/07/1979 
6 

Pakistan 
Period 
BPO 
197677 to 30/06/1978 
8 
Since 01/07/1978 
6 

