http://sizeofaex6zgovemvemn2g3jfmgujievmxxxbcgnbrnmgcjcjpiiprqd.onion
So, when I got home I looked into it. First of all, what looked really fishy was that the NS, A and CNAME records were nowhere to be found, and the domain was not resolving anywhere, so I took it to Njal.la support, who are the rightful owners of the sizeof.cat domain.