Here's my pattern, as promised.
I used chunky Filz-It yarn and 7mm needles and felted the finished hearts in the washing machine before using them for my final project.
k = knit
inc 1 = increase 1 by knitting into the front and back of the stitch. Knit into the front of the stitch as normal and, before slipping it off the needle, knit into the back of the same stitch, then slip it off (2sts).
k2tog tbl = knit 2 together through back loops (produces a left hand slope)
k2tog = knit 2 together (produces a right hand slope)
Cast on 1st.
Row 1: K1
Row 2: Inc 1 as above (2sts)
Row 3: K
Row 4: Inc 1 twice (4sts)
Row 5: K
Row 6: Inc 1, k2, inc 1 (6sts)
Row 7: K
Row 8: Inc 1, k4, inc 1 (8sts)
Row 9: K
Continue to inc 1 at each side of the heart until you have 16sts (or the size you require)
Rows 17-20 inclusive: K
Row 21: K2togtbl, k4, k2tog, k2togtbl, k4, k2tog (12sts)
Row 22 (working on one side of heart shaping): K6
Row 23: *k2togtbl, k2, k2tog (4 sts)
Row 24: K
Row 25: k2togtbl, k2tog (2 sts). Pass one stitch over the other & fasten off.*
With the wrong side facing, rejoin yarn to complete the shaping of the other side of the heart, k6 and repeat from * to *
Darn in loose ends and, if felting your heart, do not trim until after it has been in the washing machine.