Wear clothes that fit. Clothes that are too small or too big will both make you look bigger than you are. Clothes should not be tight because this creates and emphasizes the appearance of fat rolls. Instead, just wear clothes that fit: your clothes should lightly hug your form without squeezing.
What Sells Best On Shutterstock?
Some types of photos that sell best are Portrait Photography, Food Photography, Landscapes (usually with people) and fine art photography (artsy).