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Using 3.25mm needles and yarn A, cast on 81 (91:103:113:125:135:147:157:171) sts.
Row 1 (RS): K1, *P1, K1; rep from * to end.
Row 2: P1, *K1, P1; rep from * to end.
These 2 rows form rib.
Cont in rib until work meas 6 cm, inc 1 st at centre of last row and ending with RS facing for next row.
82 (92:104:114:126:136:148:158:172) sts.
Change to 3.75mm needles.
Beg and ending rows as indicated, using the intarsia technique (twisting yarns together at back of work when changing colour), repeating