HCFA CMS 1500 form for computer printing, continuos feed. Partial box of new forms from Tops Business Forms, approximately 800 sheets, perforated for easy separation of individual forms and removal of perforated edges.  Each page is 9.5" wide and 11 long. 
4.5 inches thick and weighs 11 lbs, so will have to get actual shipping cost at post office if needing to ship it.