The phrase "the size it" is spelled /ðə saɪz ɪt/. The first word "the" is pronounced with the voiced dental fricative /ð/, while the second word "size" is pronounced with the diphthong /aɪ/. The third word "it" is pronounced with the vowel sound /ɪ/. The spelling of this phrase follows typical English phonic rules and should be easy to read and write for native English speakers or those familiar with the language.