Where did you find that? Most of TMSC's 28nm lines are 300mm, the rest are 200mm. Last summer they were talking about 450mm being ready 2016-2017
http://www.brightsideofnews.com/2013/06/03/tsmc-future-revealed-450mm-wafers2c-16107nm-finfet2c-cowos-more/
Ok, then a 300mm wafer could fit in there. My bad. How tall is edward? Let's work out the size of that thing! http://www.brightsideofnews.com/2013/06/03/tsmc-future-revealed-450mm-wafers2c-16107nm-finfet2c-cowos-more/
http://hashfast.com/category/golden-nonce-asic/
^^ is that the size of the die or of the substrate?