How Do UGC Creators Bypass Dynamic Head Requirements?

UGC heads have very specific requirements and are pretty hard to meet. The max size is around 1.5 studs, however, heads like these have some how moved hat attachments out of bounds, and also got a bigger size than the limit. How does this work?

Well if you know anyone who owns this hat and is wearing it currently, you can import their character into Studio, then take out their hat and see how it’s constructed.