Party Vibe

possibly custom made, originally a film / tv / theatre prop?

it looks like part of an outfit that would have been used in something like a childrens TV show or similar performance where an actor would have been required to dress up as a giant anthromorphised rabbit (or maybe a hare which you might refer to as a jackrabbit). It looks like whoever made it has some knowledge of what these animals look like in real life, rather than following a cartoon character design.

in recent years this sort of stuff is increasingly done on computer graphics and a lot of TV and film studios have closed down ; when that happens a lot of stuff is sold off very cheaply or even given away to former employees/contractors, especially if its taking up room and the whole building is to be knocked down or reused for something like a call centre.

in the UK and Europe it is possible to obtain at fancy dress/costume places a horse head mask (though not as realistic) and a few years ago it was popular to wear them at some EDM events (probably as a reference to taking the drug ketamine, as some supplies were originally intended for horses and diverted from vets).