wɪðˌɪn ðiːz lˈɪmɪts fɹʌm wˈɛstnɔːɹθwˈɛst tʊ ˈiːstsˈaʊθiːst, ɪts lˈɛŋθ ɹˈiːtʃᵻz twˈɛnti wˈʌn kˌeɪˈɛm ænd ɪts ˈævɹɪdʒ wˈɪtθ ɪz twˈɛlv kˌeɪˈɛm.
Within these limits from west-northwest to east-southeast, its length reaches 21 km and its average width is 12 km.