The Big Diamonds stitch is worked over a multiple of 16 sts.
Row 1: P6, * 2/2LC, p12; rep from *, ending last repeat with p6.
All even number rows: Knit the knit stitches and purl the purl stitches.
Row 3: P5, * 2/1RPC, 2/1LPC, p10; rep from *, ending last repeat with p5 (instead of p10).
Row 5: P4, * 2/1RPC, p2, 2/1LPC, p8; rep from *, ending last repeat with p4.
Row 7: P3, * 2/1RPC, p4, 2/1LPC, p6; rep from *, ending last repeat with p3.
Row 9: P2, * 2/1RPC, p6, 2/1LPC, p4; rep from *, ending last repeat with p2.
Row 11: P1, * 2/1RPC, p8, 2/1LPC, p2; rep from *, ending last repeat with p1.
Row 13: * 2/1RPC, p10, 2/1LPC; rep from * to end.
Row 15: K2, * p12, 2/2LC; rep from *, ending last repeat with k2 (instead of 2/2LC).
Row 17: * 2/1LPC, p10, 2/1RPC; rep from * to end.
Row 19: P1, * 2/1LPC, p8, 2/1RPC, p2; rep from *, ending last repeat with p1.
Row 21: P2, * 2/1LPC, p6, 2/1RPC, p4; rep from *, ending last repeat with p2.
Row 23: P3, * 2/1LPC, p4, 2/1RPC, p6; rep from *, ending last repeat with p3.
Row 25: P4, * 2/1LPC, p2, 2/1RPC, p8; rep from *, ending last repeat with p4.
Row 27: P5, * 2/1LPC, 2/1RPC, p10; rep from *, ending last repeat with p5.
Repeat Rows 1 - 28, ending on a Row 1.
Abbreviations:
2/2 LC: Slip 2 sts to CN and hold in front, K2, then K2 from CN.
2/1 LPC: Slip 2 sts to CN and hold in font, P1, then K2 from CN.
2/1 RPC: Slip 1 st to CN and hold in back, K2, then P1 from CN.