The phrase "a not so mini" is correct and usable in written English.
It can be used to describe something that is larger than what is typically considered "mini" or small, often in a humorous or ironic way.
Example: "I ordered a not so mini pizza for dinner, and it turned out to be enough to feed a small army."
Alternatives: "a rather large" or "a surprisingly big".
While there is a not-so-mini-industry of Oscar pundits, blogs and predictors, nobody knows anything -- all the declaratory talk of this film "gaining momentum" and that one "weakening" is mostly conjured baloney pushed along by spinners for the respective films.
What was baking in our oven was not a cake or even a souffle: it looked more like a mini (not so mini actually, since it filled much of the oven before it exploded) Mount Etna, Mount Kilimanjaro or Mount Fuji -- even after I had reduced the baking powder and baking soda to a quarter of the amount.
My company puts on a mini conference every month called Catalyst week as a part of a not-so-mini project called the Downtown Project, where Tony Hsieh is successful creating the most community-focused city in the world with the tag line, "Downtown Vegas makes you smarter".
Mitterrand, for example, placed the phones of some hundred people under surveillance in order to keep the secret of his second family from coming out: a not-so-mini Watergate.
Though mini and teacup pigs don't stay so mini, they sure provide loads of joy when they are small.
It's not so much a play as a weekend mini-break, a theatrical experience that lasts longer than some relationships.
Restraint is not so common on television mini-series that it should go unrewarded.
Joshua Ramus proposed embedding the skyward-facing tiles with a fine aluminum mesh — miniblinds so mini that they wouldn't be seen from afar.
There were times when you felt that what was required beside Royal Aberdeen's 18th green was not so much a recorder's hut but a mini psychiatric ward.
Strangely enough, what sounds so terrifying coming out of Trump's mouth today is not so different from what Obama, minus the brazen racism, has articulated as policy in recent years.
If the central bankers are even half as blunt in public as they are in private, Mr Kohl is in for trouble.The Bundesbank is not so worried about whether there is a mini-overshoot of that 3% for this year.
