Yellow DK yarn
Dark Brown DK yarn
White DK yarn
Black DK yarn
Blue DK yarn

Obviously you’ll need mostly yellow then brown but only small amounts are needed.

This will depend on your tension in garter stitch; this one is 16 cm x 16 cms square; approximately 6” x 6”. If you wish to make it bigger or smaller then cast on more or fewer stitches but remember to alter the rest of the pieces accordingly.