Canadian Maple Boomerang
You can buy the pattern individually or as part of the International Boomerangs collection (4 patterns for 7.50 Euros).
Boomerang shape with a maple key texture, which is quite easy to work (you only need the cable needle every 8 rows ☺).
Yarn weight of your choice (fingering to aran) - minimum 300m/330 yds - more if you want to make a larger version.
Many thanks to the testers: