Pattern by Kristina McGowan at Purl Soho 

YARNS
Color A:Purl Soho’s worsted twist, 100% merino wool, heirloom white, 3 skeins, 365m[398yds]
Color B:Purl Soho’s worsted twist, 100% merino wool, mountain rose, 3 skeins, 430m[470yds]

TOOLS & MATERIALS
Circular needles, 60cm[24”] or [80cm]32”, UK Size 6 [US Size 8]

GAUGE
19 stitches x 38rows = 10cm[4"] in mosaic stitch, using colors A and B
15 stitches x 32rows = 10cm[4"] in garter stitch, using color A

SIZE
66cm[26"] x 89cm[35"] approx.

LEVEL
Intermediate

STITCHES & ABBREVIATIONS
k:knit
sl:slip
st/s:stitch/es
sls/s:slipped stitch/es
rep:repeat

ROW-BY-ROW INSTRUCTIONS
With color A, cast on 123 (159, 195) sts.
Set-Up Row: with color A, k to end of row.
Row 1: (right side): with color B, k1, *sl 1 (see Instructions), k11, rep from * to last 2 sts, sl 1, k1.
Row 2: and all following wrong-side rows: k the same sts you k on the previous row, with the same color; and sl all of the same sls/s, with yarn in front.
Row 3: with color A, k4, *[sl 1, k1] 3 times, sl 1, k5, rep from * to last 11 sts, [sl 1, k1] 3 times, sl 1, k4.
Row 5: with color B, k3, *sl 1, k7, sl 1, k3, rep from * to end of row.
Row 7: with color A, k2, *sl 1, k3, sl 1, k1, rep from * to last st, k1.
Row 9: with color B, k5, *sl 1, k3, sl 1, k7, rep from * to last 10 sts, sl 1, k3, sl 1, k5.
Row 11: with color A, k2, *sl 1, k1, sl 1, k5, [sl 1, k1] 2 times, rep from * to last st, k1.
Row 13: with color B, k7, *sl 1, k11, rep from * to last 8 sts, sl 1, k7.
Rows 15 - 16: with color A, rep rows 11 + 12.
Rows 17 - 18: with color B, rep rows 9 + 10.
Rows 19 - 20: with color A, rep rows 7 + 8.
Rows 21 - 22: with color B, rep rows 5 + 6.
Rows 23 - 24: with color A, rep rows 3 + 4.
Rep rows 1-24 thirteen (17, 20) more times.
Rep rows 1-14 once more.
Next row (right side): with color A, k to end of row.
With color A, bind off all sts knitwise.

CHART

Download chart here. 

Instead of following the written text above, you may find it easier to follow this chart instead. A few notes on how to follow mosaic charts…

The chart begins at the lower right corner on row 1. Each horizontal row represents two rows of knitting. The rows going from right to left are on the right side, and the rows going from left to right are on the wrong side.

On every row that begins and ends with a color B gray square, all color B stitches are knitted and all color A stitches are slipped. On every row that begins and ends with a color A white square, all color A stitches are knitted, and all color B stitches are slipped.

END
Weave in the ends, block as desired and enjoy!