I deliberately don’t specify a yarn weight to use for my knitted toys because I want knitters to choose based on the desired size for their finished toys. I provide approximate finished dimensions for versions made in fingering and worsted weight for each knitting pattern.
The header picture for this post shows the Sitting Dragon pattern made up in both fingering and worsted weight. The fingering weight version is 3.5 inches (8.75 cm) from seat to head, great for carrying in a pocket or serving as a tiny desk dragon. The worsted weight is almost twice as large, 6 inches (15 cm) from seat to head, a good size for cuddling.
The pattern made up in sport or dk weight would fall somewhere between fingering and worsted in size. Bulky or super bulky weight would size up larger than worsted.
And now for a little pseudoscience:
Pterodactyl’s Ability to Capture Smaller Toys as a Function of Yarn Weight
Here are photos of the Pterodactyl made up in fingering and worsted weights.
The fingering version is 6.5 inches (16.25 cm) long with a wingspan of 10 inches (25 cm).
The worsted version is 11.5 inches (28.75 cm) long with a wingspan of 17 inches (42.5 cm).