Fashion designers traditionally show their clothing collections about twice a year to prospective buyers from all over the world. How well a model brings the clothing to life and demonstrates the important features of the garments can determine how well they sell. So, it is worth it to a designer to have the most ideal models to show their collections. This leads to why models have to meet very strict requirements, and why they get such high fee for this work. These fashion models tend to be very tall, slender and move very well in clothes.