The world of modeling is made of unwritten rules, and it’s own language.
Here are some common terms, so you can keep up in a conversation!
1.  Money given to models to secure their agreement for a booking. (Normally given to more in-demand models).
2.  Money spent by the agency for things you need, that you’ll have to pay back.

The person who negotiates with clients to get and contract for work for models.CASTING
(also go-see. ) A process for selecting models for a job, much like an interview, where models present themselves to a client/casting director

(also “composites,” “comps” or “zed cards”.)  Serves as a model’s business card. It is usually double sided,  has several pictures, along with the model’s name and measurements.  Normally they are printed on heavy coated card stock and are roughly 5 ½ x 8 ½ inches.

On most modeling jobs, the model will be legally treated as a contractor, not an employee, so the client will not withhold payroll taxes or pay workers compensation insurance.

Also referred to as a “hold”, which is basically a client’s second choice model. If a model does not show up for a job, the client call s in the second option. A second option is obligated to be available for the client’s job if booked, and may not accept any other assignment.

A model’s collection of their photographs compiled and presented in a book. Works as a visual resume for a model.

Money paid to a model or actor for continued use of their pictures after the photo shoot.  In modeling “residuals” typically are paid when the usage rights originally purchased by the client have expired, and the client wants to continue to use the pictures.

A model’s body measurements.  For female models, stats usually include height, bust/waist/hips measurements, hair and eye color, shoe size and dress size.  For male models stats include height, jacket size, neck, sleeve waist and inseam measurements, shoe size, and hair and eye color.

Models get paid for two things:  work they do on the set, and the right to use their images in advertising.  Sometimes the fee will be “flat,” meaning it includes both.  But often the two will be separately listed in the booking, and the model will get paid for a specific, limited use of their pictures.