Measurements:
Sitting height of ~36 cm (14 inches), width of ~18 cm (7 inches).

Materials:
Worsted Weight Yarn:
Impeccable Tweed (Loops and Threads, 127.5 g), Black, < 1 skein
Impeccable Tweed (Loops and Threads, 127.5 g g), Pumpkin, < 1 skein
Impeccable Tweed (Loops and Threads, 127.5 g g), Guacamole, < 1 skein

Needles: 5.00 mm (size 6) double pointed needles (or whatever size is needed for the gauge)
5.00 mm crochet hook (for making the hat)
Toy stuffing
Beanbag (optional)
Tapestry needle

Notes:
I recommend reading through the entire pattern (including assembly) before you begin.
This pattern is written in US terms.
This pattern is primarily knit, but the hat is crocheted. Alternatively, you could purchase a fabric / novelty hat.