I recently came across the ‘Baby Surprise Jacket’ designed by Elizabeth Zimmermann in 1968. It is knitted completely flat in on piece and than folded like origami to make a complete jacket.
I ordered her book ‘Knitting Workshop’ and now working on my first piece to understand the method. Later I would like to make an adult version for myself using pieces of kimonos again. I am half way and completed all decreases, which forms the sleeves.