Requires 7 buttons.

Robin Seascape yarn (50 gr. balls) requires 14, 15, 15, 16, 17, 18.
Robin Aran yarn (50 gr. balls) requires 15, 16, 16, 17, 18, 19.
Robin Aran Tweed yarn (50 gr. balls) requires 17, 17, 18, 19, 20, 22.

Tension:
13 stitches = 5cm measured over main pattern.
9 stitches = 5cm over rice stitch.