Hayom Yom: Sivan 14

In putting on the tallit-katan in the morning, with "clean" hands1 and in a place where a b'racha may be said, recite al mitzvat tzitzit; (L'hitateif b'tzitzit is only said for a large tallit that has the size for "enwrapment.") If one may not say a b'racha when putting on a tallit-katan, then before davening, hold the four tzitzit and say the b'racha then. However, if one is wearing a large tallit as well, no b'racha is said for the tallit-katan.