finished measurements:
Mittens:
Mitten circumference: 7 3⁄4 (8 1⁄2)“ / 19.5 (21.5) cm
Length: 9 1⁄2 (10 1⁄2)” / 24 (26.5) cm
Shown in size 7 3⁄4” / 19.5 cm.

Hat: Head circumference: 18 1⁄2 (19 3⁄4, 21, 22 1⁄4)“ / 47 (50, 53.5, 56.5) cm
Hat height: 8 (8 1⁄2, 9, 9 1⁄2)” / 20.5 (21.5, 23, 24) cm
Shown in size 18 1⁄2” / 47 cm.
Intended to be worn with 2” / 5 cm of negative ease.