With A, ch 11.
Row 1 Sc in 2nd ch from hook and in each ch across; turn – 10 sts.
Row 2 Ch 1, sc through the back loop in each sc across; turn.
Repeat Row 2 until piece measures 7½ (9)" [19 (23) cm], slightly stretched.
Slip st short ends together to form Cuff; do not fasten off. Reverse Cuff so seam is on inside.
Rnd 1 Ch 1, working in sides of rib rows, work 20 (25) sc evenly spaced around; join with slip st in first sc.
Rnd 2 Ch 1, sc in each sc around, do not join.
Continue to work in rnds of sc, working in a spiral, marking first st of each rnd, moving marker up as work progresses, until Mitten measures 4 (4½) inches [10 (11.5) cm] from beginning.
Next Rnd Remove marker and ch 4 (5), skip first 4 (5) sc, sc in next sc and in remaining sc around – 20 (25) sts.
Next Rnd Replacing marker in first st, sc in each ch and sc around – 20 (25) sc.
Continue to work in a spiral until Mitten measures 9 (10) inches [23 (25.5) cm] from beginning.
Dec Rnd 1 *Sc in each of next 3 sc, sc2tog in next 2 sts; repeat from * around – 16 (20) sts.
Dec Rnd 2 *Sc in each of next 2 sc, sc2tog in next 2 sts; repeat from * around – 12 (15) sts.
Man's Size only Work 1 rnd even in sc.
Dec Rnd 3 *Sc in next sc, sc2tog in next 2 sts; repeat from * around – 8 (10) sts.
Dec Rnd 4 *Sc2tog in next 2 sts; repeat from * around – 4 (5) sts.
Fasten off, leaving a 24 inches [61 cm] tail. Using large-eyed, blunt needle, thread tail through remaining sts; pull tightly and secure.
Join A to any st in Thumb Opening and work 10 (12) sc around. Continue to work in spiral until Thumb measures 3 (3½) inches [7.5 (9) cm] or desired length. Using large-eyed, blunt needle, thread tail through remaining sts; pull tightly and secure.
With B, make chain approximately 7½ (8) inches [19 (20.5) cm] long; sc in 2nd ch from hook and in each ch across. Fasten off. Position trim in the shape of a heart on back of Mitten and sew in place.
Cut 2 strands of B, each 8 (9) yards [7.5 (8.25) m] long; fold in half. Secure folded ends around door knob. Twist other end until taut and yarn begins to kink. Release end from door knob. Bring ends together and let cord twist on itself, smoothing to even the twist. Knot ends. Attach ends to inside cuff seam of each Mitten.