i's

Let's cross some T's and dot some I's.

Tom always crosses his t's and dots his i's.

ruТом всегда ставит палочки над "t" и точки над "i". — marafon

Be sure to dot your 'i's and cross your 't's.

ruУбедись, что не забыл про детали. — Karok

deAchte darauf, dass du dein i mit einem Punkt und dein t mit einem Querbalken versiehst! — Pfirsichbaeumchen

He who minds his Ps and Qs will not forget to dot the "i's" and cross his "t's", when writing.