Back piece: ... Work next row as follows from RS: 1 edge st, *6 garter sts ..

Front piece: ... Work next row as follows from RS: 1 edge st, *3 stocking sts...

Back piece:
Change to needle size 5.5 mm. Work 12 rows garter st, at the same time inc 12-10-14-16-17-19 sts evenly on first row = 66-72-80-90-99-109 sts.

Left front piece:.....
At the same time when piece measures 56-59-62-64-67-70 cm work 2 rows garter st on the 8 front band sts only.

The right order for diagram text is:
blank square = K
cross in square = P
triangle in bottom right corner = K2 tog
triangle in bottom left corner = slip 1 st as if to K, K1, psso
upwards triangle in center of square = slip 1 st as if to K, K2 tog, psso
circle in square = 1 YO
diagonal line in square = P2 tog
downwards triangle in center of square = P3 tog

There is a new chart for M1 published.

Back piece: .... Work 4 rows garter st and then K 1 row from RS, at the same time dec 4-4-2-4-2-2 sts evenly = 70-78-86-94-106-114 sts.

New measurement chart

diagram symbols
empty box = K from RS, K from WS

Button cover: Crochet 1 cover with crochet hook size 3.5 mm and pink Muskat as follows: 2 ch, then 16 tr in the first ch...