The Mint Green Suit and Cardigan
Hepburn spends a lot of the film in her role as secretary wearing this outfit, consisting of a mint green skirt and jacket, with a white shell. Later, an oversize white cardigan gets thrown over it.
Our first glimpse of Hepburn in the film:
Back view of the jacket, and of the inverted pleat in the centre back of the skirt:
The white shell:
Does the shell fasten at the shoulder?:
Looks like it’s knitted in a simple lace pattern, with garter stitch collar and cuffs. Some kind of blue piping/trim runs down the front neck to the button band. The shape is fairly boxy.
Close-up of the neck and collar:
Audrey uses the oversized cardigan to good effect: