I knit this pair with the most delicious yarn -- a fingering/sock weight, tonal yarn called Stroll from Knit Picks, and the pattern is a simple one I made up myself. These mitts can be made with fingering, sport, DK or worsted weight, but no matter the weight of the yarn, for small even stitches, I nearly always knit them up with size 3 needles.
To make them I cast on 52 st., then worked 52 rows of knit2, purl2 ribbing. After casting off, I stitched up the sides (leaving holes for thumbs), embellished with buttons, and that's all. Sometimes I make similar mitts with a knit3, purl1 ribbing.
Of course, to make the mitts a bit larger you can cast on a few more stitches, to make them longer, knit a few more rows, and yes, one could knit these in the round on dp needles, but I find it tiresome to keep the tension as I shift from needle to needle (I would rather just sew up the seams.)
I wish I had the energy for more complex projects, but right now, these mitts are the perfect knitting project for me -- small, knitting meditations...
As for the mouse, you can find a pattern for him in this book here.
p.s. Thank you to my 10-year old for modeling the mitts. He has the most gorgeous (slightly grubby) hands, don't you agree?