I have used an A4 paper size for my magazine as thats the common size for a magazine. I will always have the logo of the magazine on the top right. I will save the images as png's and then move them in to indesign to complete the magazine.
I think some of these photos are quite good and could be used for an article that will show the audience how to do a backflip gainer. It will fit the genre of my magazine as its a parkour tutorial.