YOU SAID:

she is as thick as nails

INTO JAPANESE

彼女は釘と同じくらい厚い

BACK INTO ENGLISH

She is as thick as a nail

INTO JAPANESE

彼女は爪と同じくらい厚い

BACK INTO ENGLISH

She is as thick as her nails

INTO JAPANESE

彼女は爪と同じくらい太い

BACK INTO ENGLISH

She is as thick as her nails