Posted by Battery Cables USA on 5/3/2021 to
Here is some help on measuring the bolts:
https://ricksfreeautorepairadvice.com/how-to-measure-a-bolt/
You can also take the nut off and go to hardware store and see what size it is or you can see what size wrench or socket is used and use a nut to bolt size chart.
Here are the wrench to bolt size charts:
USA Sizes: https://www.boltdepot.com/fastener-information/Printable-Tools/US-Nut-Size-Chart.pdf
Metric: https://www.boltdepot.com/fastener-information/Printable-Tools/Metric-Nut-Size-Chart.pdf