These were made to match Porom for my sister's birthday, with a little bit of Ultra Alpaca Light I had left over. They were great fun and lovely and quick - I think I might be making some more mittens come Christmas...
As the instructions for the thumb were a bit minimal, I worked 10 rounds stocking stitch and 6 1x1 ribbing.
The pattern also didn't specify what sort of cast-off to use. I initially tried casting off in rib, but I found it was a little too stretchy like that, and wouldn't necessarily fit snugly around the fingers, so I ripped back and cast off knitwise instead which was much better.
Not that I'd really criticise the pattern - it was a freebie, so the occasional vague bit here and there is totally forgivable.
Pattern: Wilhelmina by Lena Gjerland
Yarn: Berroco Ultra Alpaca Light
Amount: 1.5 skeins
Size: One size
On ravelry: here