You are getting 2 pairs (4 arms) of cloth arms at this price. These are the type of cloth arms used at retailers like The Gap and Banana Republic for displaying garments with long sleeves. This is NOT recommended for sewing purposes.
These gently used cloth mannequin arms can be pinned on ANY jersey covered dress form. The series of photos below show how to attach them to the form using T-pins.
These are UNISEX arms. Use them in the current shape for male or plus size dress forms. Pin them in half to make them smaller for a female dress form.
Dress form is NOT included.