Hot Socks Police Blue Nanna Rug

Knitty Gritty:
squares are 10cmx10cm. (roughly 4"x4").
I used 2.50mm needles
I got just over 20 squares per 100gm ball of sock wool = 420m/100g.
My rug is 7 wide x still going till the wool runs out..
I decided to do a garter st edge, half sized = 14sts x 28rows, so I will be able to cover 40 edge squares per 100g.

A single bed is 90 x 190cm = 9 x 19 squares, for instance and would need 171 squares, 9 x 100g would be needed. and would need 150g to do a half square around the edge.

OK, here is my garter stitch mitred square DIRECTIONS:

All squares: knit every alt row

FIRST ROW:
FIRST square ONLY: cast on 57 = (28+1+28). cast on row is ON THE OUTSIDE
Next row & every alt row: knit
2nd row: knit 27, slip 1, knit 2tog, pass slip st over; knit 27 (=K27; S1, K2tog, psso; k27)
4th row: K26; S1, K2tog, psso; k26
6th row: K25; S1, K2tog, psso; k25
and so on. Continue till you have one stitch left DO NOT CUT YARN.

SECOND square and all squares in first row: pick up 28 from INSIDE edge of one side of the first square (first st is the one left from the previous square) and cast on 29 = (28+1).
Next row & every alt row: knit
2nd row: knit 27, slip 1, knit 2tog, pass slip st over; knit 27 (=K27; S1, K2tog, psso; k27)
4th row: K26; S1, K2tog, psso; k26
6th row: K25; S1, K2tog, psso; k25
and so on. Continue till you have one stitch left DO NOT CUT YARN.

Continue along in this way until you have the length you want. CUT yarn on LAST SQUARE

Step 1: FIRST SQUARE OF NEXT ROW OF SQUARES, starts on the opposite end, ie go back to the beginning and do first square UNDER the very first square done:
cast on 29 = (28+1) and pick up 28 from INSIDE edge of one side of the first square.
Next row & every alt row: knit
2nd row: knit 27, slip 1, knit 2tog, pass slip st over; knit 27 (=K27; S1, K2tog, psso; k27)
4th row: K26; S1, K2tog, psso; k26
6th row: K25; S1, K2tog, psso; k25
continue till you have one stitch left, DO NOT CUT YARN.

Step 2: ALL "INSIDE" SQUARES:
Pick up 28 from INSIDE edge of one side of the first square (first st is the one left from the previous square), 1 from the centre then 28 from the other side = 57sts.
Next row & every alt row: knit
2nd row: knit 27, slip 1, knit 2tog, pass slip st over; knit 27 (=K27; S1, K2tog, psso; k27)
4th row: K26; S1, K2tog, psso; k26
6th row: K25; S1, K2tog, psso; k25
continue till you have one stitch left DO NOT CUT YARN.

continue along in this way until you have the length you want. Cut the yarn on the last square.

Repeat these steps 1 and 2 until you have the length you want (or the wool runs out, whichever comes first!).