Your look is a key factor, but not all models have to be a certain weight, size, body type and be beautiful in order to work as model. But you do need to have the x-fator and acting experience that will appeal to the audience clients want to capture that would be most interested in buying the product they are selling. Models need to have a certain niche that helps them standout for certain roles like “young mothers”, “doctors” or “rockstar,” which a product needs and wants to capture.
Professional models have agents and modeling agents normally charge between 10 - 30% of what they are paid, and should not charge upfront fees for representing you. Representation is the best bet toward getting actual work.
Having a modeling agency doesn’t necessarily guarantee work as a model, however, the chances of landing a role or a job are increased by being fully represented by a modeling agency. Models professional need to have discipline, be on time, and receive direction well. A great personality, professional modeling skills, and an acceptance to change your look to fit the role are essential requirements in becoming a succesful model. You need to sell yourself as a product endorser and despite running into criticism, self-confidence and belief in your capabilities is your stepping stone to become a supermodel.

When you meet clients, present yourself as a blank slate. Don’t wear excessive makeup or jewelry, keep your hair simply groomed, and wear simple clothing. Your personal sense of style can sometimes interfere with the advertisers ability to see you as what the product needs for the shoot or project.
When you’re in a shoot you need to give the client or director what they need. You should be familiar with poses, looks, and body positions and be confident in front of the camera. Study all types of modeling representing the type you want to work in and copy these poses in front of a mirror.