Worsted yarn ( this will make larger outfit)
Size 6 needles
Cast on 40 stitches.
Knit 4 rows of k1, p1.
Knit in stockinette stitch (k1 row, p1 row) until leg is 3" long, or desired length.
(for newborn size, approximate 6" for the leg is good)
Increase 1 st each end 3 times on the knit side. (this will designate the crotch area)
Knit 4" from increase stitches.
Ending on purl side, place 46 stitches on stitch holder. Cut 8" tail of yarn.
Work same as right leg; except leave 46 stitches on the needle and leaving yarn attached.
the tail of yarn can be used to sew the seam to the crotch later)
Right leg will be joined to the left leg.
Begin with left leg, k1, k2tog , *k3, k2tog, repeat from * to end of left leg, now join right leg and continue decrease of * k3, k2tog to end, k1, (74 st)
Next row; Rib k1, p1 across for 4 rows.
Wrong side - purl side of garment facing you.
With right and left leg now all one piece, bind off 23 stitches (next 29 stitches will be the bib), count ahead the next 29 stitches and put a safety pin there. Purl across to the last stitch where the safety pin is marked. Bind off remaining stitches to the end.
The 29 stitches of the bib will still be on the needle. Attach yarn to the bib. The knit side should be facing you.
Stockinette stitch ( k1 row, p1 row) the bib for 2 1/2".
K3, yarn over, k2tog , then k to the last 5 stitches, k2tog, yarn over, k3. (The yarn over is the buttonholes)
Purl next 4 rows. Bind off.
Sew front, back and leg seams.
Once all seams are sewn, at back from center back seam, about 1" from right of back seam, pick up 6 stitches on the needle.
Also, 1" from left side of back seam, pick up 6 stitches. This will be the straps.
Stockinette stitch ( k1 row, p1 row) on the 6 stitches. You can add another ball of yarn to the 2nd set of 6 stitches so that both straps are knit at the same time so each side is equal in length. You can knit this for 11" or whatever desired length. Bind off.
Sew on buttons to the end of the straps.
Decorative buttons are really cute.
You may also add an applique in the center of the bib. I have done overcast stitches in the center of the bib and in the back on the buttocks to look as if they are pockets to resemble overall bib jeans.