My friend and colleague at work liked the BSJ I made so much she wanted to make one for her daughter. She chose her yarn, seeing as it was sport weight it needed to be held double to create a bigger jacket, and using 5mm needles she made her start. There were a few hiccups along the way (she’s only just started knitting, I taught her) but in the end we got there.
I think she’s done a great job, and the jacket turned out really cute.
Just to give you an idea of the difference in size.