My 3 week old wears a long sleeved vest, babygrow and 2.5 tog sleeping bag. Out room is between 16-18degrees
My 5 week old has vest, baby grow and 2.5 tog sleeping bag too. Our room is usually about 18°c. I found by week 4 he was fidgeting so much he’d kick his blanket off even though it was tucked in, he loves the sleeping bag!
Ours is in a vest, long sleeved and footed sleep suit, and folded cellular blanket. Room sits at about 18 and it seems to work for him, he runs quite warm generally.
i put me like one in a vest plus baby grow my rooms normally 25 degrees on average plus my window is always open x