The biggest bulge reported by Tepco in May 2012 was 33 mm. The biggest bulge now being reported is 46 mm.

Tepco's latest data:

[link to www.tepco.co.jp]

Translated:

Tepco revised the data of the reactor4 building on 6/25/2012

[...]

The South-West corner of reactor4 building turned out to be bulged/leaned to outward.

The third floor is 46mm outward compared to the first floor. On their last report, it was 33mm.

[...]

[link to enenews.com]