Most mopars are 8, 10, 13, 15, 18 mm and 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4
Though some interchange for ex. 8mm=5/16, 11mm=7/16, 13mm=1/2, 14mm=9/16 - all approximations and will often (but not always work) for ex. the metric is usually just a hair larger than the SAE and the SAE won't fit...