Yesterday I just had this eager to knit a pair of mittens for myself. The main yarn, Aino, was easy to choose, and just to add little crazyness to go with it, I added the fun fur.
I used one ball (50g) of fun fur (all I had), but for larger size, there should be two balls. One ball (100g) of Aran/Bulky weight yarn will easily do also for a larger size, as my medium size mittens took ~50g.
When knitting with limited yarn scource, I’d recomend using magic loop to make identical mittens.