Yosef Karo

“ Paragraph 13 — One who wears a tallit katan and says the blessing on it, and then goes to the synagogue and wraps in a tallit gadol, must say the blessing on the tallit gadol, because the walk from one's house to the synagogue is considered a pause. If one is praying in his own house, if he had the intention from the start to also put on the tallit gadol and did not pause between [wearing the tallit katan and tallit gadol] to engage in conversation or other things, one is not required to make another blessing (on the tallit gadol) . ”

“ Paragraph 5 — One says the blessing "to wrap oneself in tzitzit." If two or three wrap themselves in the tallit together (meaning, at the same time) , everyone says the blessing. And if they wish, one says the blessing, and the rest answer "Amen."
סעיף ה — מברך "להתעטף בציצית". אם שניים או שלושה מתעטפים בטלית כאחת (פירוש, בפעם אחת) , כולם מברכים. ואם רצו, אחד מברך, והאחרים יענו אמן.
Paragraph 6 — On the tallit katan it is acceptable to say the blessing "to wrap oneself in tzitzit" even if one does not wrap oneself in them but merely wears them. ”