I used Moda Vera Harmony with size 5mm needles, which knitted up to 18 stitches and 24 rows.

Сast on 8 stitches.
Knit 1 round.
Knit front and back into every stitch.
Knit 1 round.
Kfb, k6, kfb, kfb, k6, kfb.
Knit 1 round.
Kfb, k8, kfb, kfb, k8, kfb (24 sts)
Continue knitting around on these stitches for about another 13 rows (I used the magic loop method).
K1, yarn forward, k2tog across the next row (eyelet row).
Knit 4 rounds.
Purl 1 round.
Knit 1 round.
Purl 1 round.
Knit 1 round.
Cast off.
Make two wrist ties to thread through the eyelets, and one long connecting cord to attach both mitts. I found that the easiest and neatest way, was to do a simple crochet chain, but an i-cord or ribbon would do the same :-)