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Square Lattice is another one of the knit and purl textured blocks that has a great optical illusion. Pay close attention to the seed stitch, which is the bumpy pattern in between the basketweave pieces. The seed stitch creates an interesting texture that makes for a dense, warm fabric, and it will lay flat so it works well for borders. It will make beautifully tailored suits, coats, or afghan squares and baby blankets.
Cast on a multiple of 14 stitches  plus 2 additional stitches.
Row 1:  right side: Knit all stitches
Rows 2, 4, and 6: Purl 2, * (knit 1, purl 1) 3 times, purl 1; repeat from * to end.
Rows 3, 5, and 7: Knit 3, * purl 1, knit 1, purl 1, knit 4; repeat from * to last 6 sts, purl 1, knit 1, purl 1, knit 3.
Row 8: Purl 2, * knit 12, purl 2; repeat from * to end.
Row 9: Knit 2, * purl 12, knit 2; repeat from * to end.
Row 10: Purl all stitches.
Rows 11, 13, and 15: Knit 2, * (purl 1, knit 1) 3 times, knit 1; repeat from * to end.
Rows 12, 14. and 16: Purl 3, * knit 1, purl 1, knit 1, purl 4; repeat from * to last 6 sts, knit 1, purl 1, knit 1, purl 3.
Row 17: Purl 7, * knit 2, purl 12; repeat from * to last 9 sts, knit 2, purl 7.
Row 18: Knit 7, * purl 2, knit  12; repeat from * to last 9 sts, purl 2, knit 7.
Repeat Rows 1 – 18.

Square Lattice stitch in the round

Square Lattice chart