BACK
Using 3.25mm needles, cast on 91 (101:111:121:131:141:151:161) sts.
Beg and ending rows as indicated, work 14 rows in patt from Chart A, ending with RS facing for next row.
Change to 4mm needles.
Beg with a K row, now work in st st as folls: Inc 1 st at each end of 5th (7th:7th:9th:9th: 11th:11th:13th) and every foll 12th row until there are 103 (113:123:133:143:153:163:173) sts.
Cont straight until Back measures 31½ (32:32½:33:33½:34:35:36) cm, ending with RS facing for next row.
SHAPE ARMHOLES
Cast off 4 sts at beg of next 2 rows.
95 (105:115:125:135:145:155:165) sts.
Dec 1 st at each end of next and foll 5 alt rows.
83 (93:103:113:123:133:143:153) sts.
Work 1 row, ending with RS facing for next row.
Work 4 rows in garter stitch, ending with RS facing for next row.
Beg and ending rows as indicated, repeating the 6-row patt rep throughout, now work in patt from Chart B as folls: Cont straight until armhole measures 24½ (26:27½:29:30½:32:33:34) cm, ending with RS facing for next row.
SHAPE BACK NECK
Next row (RS): Patt 29 (33:37:42:46:50:55: 59) sts and turn, leaving rem sts on a holder.
Work each side of neck separately.
Keeping patt correct, dec 1 st at neck edge of next 4 rows and AT THE SAME TIME cast