This is Clue 3 finished. Melanie said that her shawl measured 25" long at this point - mine measures 20" long, so I think I'll take the option of adding in one extra repeat. That should give me a finished length (roughly) of 71". The width is about 15". I could probably block it more aggressively than it's pinned out here though.
Talking about pins, I found a pack of 20 T-pins/quilter's pins in Hobbycraft recently for under £3.00. They work wonderfully with my new foam blocks. ;0)