Sizes:

6-9 months, 9-12 months, (12-15 months)

Materials:

200, 250, (300) yards DK, DK or worsted weight depending on how tight you like your weave, (worsted weight) wool.

US 5 20-in circular needle, US 7, (US 9)

Tapestry needle

4 stitch markers

6, 7, (8) buttons

Gauge:

24.5 sts/32.5 rows=4 inches using US 5 needles, 18 sts/29 rows=4 inches using US 7 needles, (15.5 sts/23 rows=4 inches using US 9 needles).

Pattern:

Choose whichever needle size for whichever size sweater you are making, and follow the pattern from there.

CO 55 sts
Work 2 rows in seed stitch (Rows 1 & 2: *k1, p1; repeat from * to end of row, end k1.)
K1, p1, yo, p2tog, continue in seed stitch to end of row.
Work 3 rows in seed stitch.
R1: (WS): k1, p1, k1, p4, *k1, p3; repeat from * to last 4 sts, end p1, k1, p1, k1.
R2: k1, p1, k1, p1, *k1, (yo, k1) 2X, p1; repeat from * to last 3 sts, end k1, p1, k1. (79 stitches)
R3: k1, p1, k1, p6, *k1, p5; repeat from * to last 4 sts, end p1, k1, p1, k1.
R4: k1, p1, k1, p1, *k2, yo, k1, yo, k2, p1; repeat from * to last 3 sts, end k1, p1, k1. (103 sts)
R5: k1, p1, k1, p8, *k1, p7; repeat from * to last 4 sts, end p1, k1, p1, k1.
R6: k1, p1, k1, p1, *k7, p1; repeat from * to last 3 sts, end k1, p1, k1.
R7: Repeat row 5.
R8:k1, p1, k1, p1, *k3, yo, k1, yo, k3, p1; repeat from * to last 3 sts, end k1, p1, k1. (127 sts)
R9: k1, p1, k1, p10, *k1, p9; repeat from * to last 4 sts, end p1, k1, p1, k1.
R10: (buttonhole row) k1, p1, k1, p1, *k9, p1; repeat from * to last 13 sts, end k9, p2tog, yo, p1, k1.
R11: Repeat row 9.
R12:k1, p1, k1, p1, *k4, yo, k1, yo, k4, p1; repeat from * to last 3 sts, end k1, p1, k1. (151 sts)
R13:k1, p1, k1, p12, *k1, p11; repeat from * to last 4 sts, end p1, k1, p1, k1.
R14:k1, p1, k1, p1, *k11, p1; repeat from * to last 3 sts, end k1, p1, k1.
R15: Repeat row 13.
R16:k1, p1, k1, *p1, yo, ssk, k7, k2tog, yo; repeat from * to last 4 sts, end p1, k1, p1, k1. (151 sts–stitch count unchanged)
R17:k1, p1, k1, p1, k1, *p9, k3; repeat from * to last 14 sts, end p9, k1, p1, k1, p1, k1.
R18:k1, p1, k1, p2, yo, ssk, k5, k2tog, *yo, p3, yo, ssk, k5, k2tog; repeat from * to last 5 sts, end yo, p2, k1, p1, k1.
R19:k1, p1, k1, p1, k2, p7, *k2, p1, k2, p7; repeat from * to last 6 sts, end k2, p1, k1, p1, k1.
R20: k1, p1, k1, p3, yo, ssk, k3, k2tog, *yo, p2, k1, p2, yo, ssk, k3, k2tog; repeat from * to last 6 sts, end yo, p3, k1, p1, k1.
R21:k1, p1, k1, p2, k2, p5, *k2, p3, k2, p5; repeat from * to last 7 sts, end k2, p2, k1, p1, k1.
R22:k1, p1, k1, p1, k1, p2, yo, ssk, k1 k2tog, *yo p2, k3, p2, yo, ssk, k1, k2tog; repeat from * to last 7 sts, end yo, p2, k1, p1, k1, p1, k1.
R23: (buttonhole row): k1, p1, yo, p2tog, p2, k2, p3, *k2, p5, k2, p3; repeat from * to last 8 sts, end k2, p3, k1, p1, k1.
R24: k1, p1, k1, p1, k2, p2, yo, sl-k2tog-psso, *yo, p2, k5, p2, yo, sl-k2tog-psso; repeat from * to last 8 sts, end yo, p2, k2, p1, k1, p1, k1.
R25: k1, p1, k1, p4, k2, p1, *k2, p7, k2, p1;* to last 9 sts, end k2, p4, k1, p1, k1.
R26:k1, p1, k1, p1, k to last 4 sts, end p1, k1, p1, k1.

(You can click on the chart to enlarge it.)

You should still have 151 sts on the needle at this point.

Sleeves:
R1: k1, p1, k1, p15. Slip next 36 sts onto a stitch holder, p43, slip next 36 sts onto stitch holder, p15, k1, p1, k1.
R2: k1, p1, k1, p1, k13, m1, place marker, k1, k stitch on left needle across from held stitches, place marker, m1, k41, m1, place marker, k1, k stitch on left needle across from held stitches, place marker, m1, k13, p1, k1, p1, k1. (83 sts on needle).
R3: k1, p1, k1, p to last 3 sts, end k1, p1, k1.
R4: k1, p1, k1, p1, k to marker, m1, sl marker, k2, sl marker, m1, k to marker, m1, sl marker, k2, sl marker, m1, k to last 4 sts, end p1, k1, p1, k1.

Repeat rows 3 & 4 two times more.

R5: k1, p1, k1, p to last 3 sts, end k1, p1, k1.
R6: (buttonhole row) k1, p1, k1, p1, k to last 4 sts, end p2tog, yo, p1, k1.

Repeat rows 3-6 until piece measures 8.5, 10.5, (12.5) inches from back of neck, or whatever length you prefer.
AT THE SAME TIME, after your first row 6, every 13 rows/every two inches, create a buttonhole as you have done throughout.

Knit 3 rows in seed stitch.
Work buttonhole row in seed stitch.
Knit 2 rows in seed stitch.

BO all sts.

Sleeves, continued:

Place held stitches for right sleeve on needle.
With RS facing, attach yarn.
K1, ssk, k to last 3 sts, k2tog, k1.
Purl one row.
Work three rows in seed stitch.
BO all sts.

Repeat for left sleeve.

Sew sleeve seams, stitch up arm holes under the arms. Weave in all ends. Block as needed, and sew on buttons opposite buttonholes.