sˈɪns ɐ lˈændmæs hɐz fˈiːtʃɚz æɾ ˈɔːl skˈeɪlz, fɹʌm hˈʌndɹɪdz ʌv kɪlˈɑːmɪɾɚz ɪn sˈaɪz tə tˈaɪni fɹˈækʃənz əvə mˈɪlɪmˌiːɾɚ ænd bᵻlˈoʊ, ðɛɹ ɪz nˈoʊ ˈɑːbviəs sˈaɪz ʌvðə smˈɔːlɪst fˈiːtʃɚ ðæt ʃˌʊd biː tˈeɪkən ˌɪntʊ kənsˌɪdɚɹˈeɪʃən wɛn mˈɛʒɚɹɪŋ, ænd hˈɛns nˈoʊ sˈɪŋɡəl wˈɛldᵻfˈaɪnd pɚɹˈɪmɪɾɚ tə ðə lˈændmæs.
Since a landmass has features at all scales, from hundreds of kilometers in size to tiny fractions of a millimeter and below, there is no obvious size of the smallest feature that should be taken into consideration when measuring, and hence no single well-defined perimeter to the landmass.