って would be written like "-tte". The small つ means the next consonant is typed twice...
みて - mite
きって - kitte
You'll also see this in words like
よっか - (yokka) fourth day (of the month)
みっか - (mikka) third day (of the month)
You pronounce it with a slight pause before the small つ
Anyone with a better answer, please feel free to correct me!