430mm sq overall with fixing points at 380mm and a fan diameter at 315mm. Hole cut needs to be 330mm. Fan is new and unused, however box has been opened. This item is in the category "Home, Furniture & DIY\Heating, Cooling & Air\Air Quality & Fans\Extractor Fans". The seller is "noz_8766" and is located in this country: GB. This item can be shipped to United Kingdom.