A 100 type battery according to Pure Tyre
a 1999 ford experdition battery
BCI group size ( 58 ) according to fordparts.com
A 2008 Ford Focus ( North America ) uses a BCI group size ( 96R battery ) It came from the factory with the Motorcraft BXT-96R / 590 cold cranking amps
22" Driver 19" Passenger 15" Rear
If you have a set of them, use the one that fits snugly.
Any place that sells batteries will have a chart listing the correct size for your Ford.
What size battery for a 66 bug
According to the 2006 Ford Focus Owner Guide : Both the 2.0 and 2.3 came with the Motorcraft BXT-96R battery ( that's BCI group size 96R ) If it is equipped with the Audiophile radio it came with the Motorcraft BXT-40R battery ( that's BCI group size 40R )
They're metric. Try them until one fits, that's what I do.
size 35
BCI group size ( 65 ) fordparts.com has batteries listed with 650 to 850 cold cranking amps for each size of engine in a 1987 Ford F-150
Any battery that fits that has at least 500 CCA. The more CCA the better especially in a cold climate.