creating a portfolio in word

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I’m trying to create a portfolio of all my images I’ve made so far on my illustration course. I have managed to add them to a Word document, but I need to know what the file size is and as I’m not up to speed with Word 10 I’m not sure where to look. If the file size is too big I will struggle to upload it to the college. Any ideas? I know I’ve got  to convert it to a PDF but I wanted to find out how big it was before I did that… Duh!