Although this pattern is for the sweater set in the middle, it can easily be adapted for either of the two side sets. For the white and green set simply substitute plain dc for shell rows. For the pink one on the right don't change colors. I used an H hook and sport weight yarn and get 4 dc = 1 inch. These sets are newborn size.
V stitch dc, ch1, dc in same stitch
Shell stitch sc, 3dc in same
Using contrasting color Ch 52
You are starting from the neckline
Guage 4 dc = 1 inch
Row 1: dc in forth chain from hook,(Ch 3 counts as 1st stitch here and in every row), dc in next 5 chains, V st in next ch, 9 dc, V st, 14 dc, V st, 9 dc, V st, 7 dc end
Row 2-6: join main color and ch 3, dc in each dc and V stitch in each V stitch.
Row 7:(forms the armholes) ch 3 and turn, dc to first V stitch, folding so 1st and 2nd V stitches are together dc in both to join them, dc to next V stitch and join 3rd and 4th V stitch in same manner, dc to end
Rows 8-15: ch 3 and turn, dc in each dc
Row 16; in contrasting color ch 1 and turn sc in same st as ch 1, *sk 1dc and shell in next dc, repeat until last 2 st, sc in last stitch.
Armhole pattern (optional)
Row 1; Join contrasting color to bottom of arm hole, sc in each stitch and join
Row 2; ch 1, *sk 1 sc, shell in next repeat from * join to ch 1 at beginning of row.
For ties, either ch 120 and thread through first row or you can use a length of ribbon
Rd 1; with contrasting color, ch 4 and join, ch 3 (counts as first st) 14 dc into loop (15 st) join to ch3
Rd 2; ch 3, 2dc in each dc, join to ch 3
Rd 3; ch 3, dc in same space as ch 3, *dc in next st, 2 dc in next repeat from * around
Rd 4 -10; change to main color, ch3, dc in each dc join to ch3
Rd 11; change to contrasting color, ch1, sc in same st, * sk 1 dc and shell in next dc repeat from * around, skip last dc, join to starting sc
Ch 3 at beginning of each rd counts as 1 dc
With contrasting color Ch 4 and sl st to form loop.
Rd 1; ch 3 and 11 dc in loop. (12 sts)
Change to main color
Rd 2; ch 3 *2 dc in next stitch dc in next repeat from * (18 sts)
Rds3 and 4; dc in each dc
Row 1: ch 3, dc in all but 3 dc
Row 2 -4: dc in each dc and end leaving 6 in tail of yarn
Sew back of heel together by using the back loops only
Join Main color yarn at back where it was sewn together
Rd 1: ch3, 7 dc evenly spaced down side, dc in each dc left open, 7 dc evenly spaced on other side and join
RD 2-4: dc in each dc end main color
With contrasting color
Rd 5: ch1, sc in same sp as ch1, *sk 1 dc shell in next dc, repeat from * around, sk last st and join to sc
For ties either ch 70 for tie or you can use ribbon.