Data Entry and Image upload of products

I have imported around 300 products into an ecommerce site. I need someone to go through each of those products and add additional information (such as sizes) for each product. The sizes are supplied on a seperate excel file. For example the site may have Point Shoe Pro, you then look that item up in my spreadsheet and add all the relevant sizes of 2x, 2xx, 2xxx, 3x, 3xx etc. Also you will need to source and upload images for each product. I will supply a list of supplier sites from where you can obtain the images from. As mentioned there are about 300 products each one with between 2 and 10 additional pieces of data to add.