This item is designed to stimulate two people at once with vibrations. Each unit (penis and vaginal plug) operate with independent multi-speed vibrators for tremendous stimulations and is made with the finest latex and filled with a firm but resilient foam. The sturdy harness is easily adjustable for comfort, and the unit is easily cleaned. The smaller cock is about 1.5 inches thick while the longer cock is 1 inch thick at the tip but thickens to 1.5 inches thick at the base. The main shaft is 6.5 inches long while the inner plug is 3.5 inches long.Fits up to a 42 inch waist.