The given gauge is for a women’s medium to large (big medium or small large ;o) it depends on how you choose to see it). The width across the widest part of the mitten is 10.5 cm and the length measured from the top of the cuff is 19.5 cm.
Moomin,... These are going to be my "Hattivatti" mittens one day :)
Free Cat on a Wall Mittens Knitting Pattern, Violet Green Hand Dyed Yarn and Knitting Shop