Regarding Hobbit Size
Vaelyn

Apart from what has already been mentioned, I'd like to point out that surely Gandalf could lift Samwise, as he later lifts Faramir from the bier at Minas Tirith before Denethor sets it aflame. If he could lift a man the size of Faramir, he could probably lift even the largest hobbit--and this isn't even taking into account that he is a Maia.