Patti by Sarah Hatton calls for Felted Tweed, an easy care merino/alpaca blend with a beautiful tweed effect.
Sizes:
S, M, L
Bust (32-34, 36-38, 40-42) in
Yarn:
8, 9, 10 balls Felted Tweed
It's knit using sizes US 3 and 5 needles.
This pattern is available as a PDF download.