It measures 5" long and 3.5" width and I don't know what size a galaxy note 3 is. It does not fit my iPhone 5G it is too small. Sorry, I can't give you any more info.
It measures in length, 5" and in width around 3.5". It won't fit my Iphone 5G in it with a case on it. It almost fits with the case off. I don't know the size of a Galaxy note 3..you would have to measure the length and width. Sorry, I can't be more specific.