Id love to test this precious Vintage cozy bear for you! Id use weight 4 yarn (worsted weight?) Using a 3.75mm hook.
Ive been crocheting for around 6 months now and completed 5 tester patterns, and once accepted i tend to hop right into crocheting the pattern. The yarn id like to use in particular is this acrylic yarn in a light gray with gold and black specks (dont have the label that it came with ) but i believe it would look really cute on this bear! I hope i maybe get to become a tester for you