after increases I ended up with 132sts.
circle chart needs a number of sts divided by 10, so I increased 28 sts = 160 sts. knitted circle chart with small needles and changed to bigger needles when I started with the flower chart. Increased 2 more sts, so that I can repeat the main part of flower (blanket) chart 3 times (54x3).
knitted about 1 and a half repeats in length, repeated circle chart, this time with large needles and knitted 4 garter ridges. washed and dried flat, then steam ironed. I´m totally happy with the result, just love it :)

30.4.: as I got some mails with the question, where to get the larger chart:

you have to buy the mitten pattern and ask the designer via email for the larger blanket chart. She kindly sends you the blanket chart for free :)