halacha - Is a Torah that does NOT have the (rabbati) large and small letters (keti'ah) still kosher?

I have a Torah in my shul that does not have any large or small letters where required (e.g. - the 1st letter in the Torah, "Breishit", is written larger than the rest.) Is this Torah still considered "kosher"?

Answer

Rabbi Moshe Isserlis writes (YD 275:6) about various scribal traditions including large/small letters that אם שינה לא פסל - if [the scribe] deviated, he did not invalidate [the scroll].

Obviously if they can be fixed, one should do so to conform with the tradition.