While LEGO does make a one-piece cast Hedwig, this set is all about assembling LEGO toys. This one is quite a bit larger than the cast owl but is also seriously smaller than the Hedwig owl construct in the No. 76425 Harry Potter at 4 Privet Drive set posted back on 16 June.
Ed
With The Cave being pretty warm this time of year, I cut my photo session's short and only took pics of Hedwig perched atop the Privet Drive sign vs. separate photo essay's of the sign, then Hedwig, then all together. Overall the sign measures 3.125" (7.93cm) W and with Hedwig perched on top, the whole thing measures 6.125" (15.55cm) H. Hedwig is cool and his wings, claws, and head are multi-positional. His tail, on the other hand, will fall off if you bend it too far.
Ed