I worked two rows for the border and 3 rows of pattern per colour which this can easily be made larger by working extra rows.

I had 13 x 100g and I only used approximately half of each ball apart from the blue border, so I would make sure you get 2 balls of which ever border colour you choose just in case.

I hope all of that makes sense but please message me if I have made a mistake and I shall update the pattern.