In case you would like to make the squares in exact the same colours as I did, here is what you need:
Drops Baby Merino, available from Wool Warehouse (international)
Inner Square x 12 in 02 – Off White
2 borders in 22 – Light Grey
2 borders in 38 – Olive
2 borders in 23 – Light Beige
2 borders in 34 – Heather
2 borders in 20 – Dark Grey
2 borders in 11 – Ice Blue
To make 12 inner squares in Off White you need 6 balls.
To make 2 borders you need 2 balls in each colour mentioned above.
If you want to extend to Season 2, you will need an additional 4 balls of 02 – Off White plus 2 balls of each of the following colours:
44 – Powder
09 – Lime
18 – Brown
19 – Grey
The Claire Square will require 5 balls in the colour of your choice.
Every 1/2 Triangle will require approximately 100m/113yds of yarn.
Every 1/1 Triangle will require approximately 203m/225yds of yarn.
Each square including border will be approximately 24cm x 24cm / 9 1/2″ x 9 1/2″.
This calculation does not consider an outer border, as the size and therefore the yarn requirements depends on your project and which border option you choose (small, medium, large).
Yardage requirements considering different border options will be updated for Season 3.