The overall measurement of this instrument is approximately 6 inches from top to bottom; each blade measures approximately 3 inches in length and it opens to an IMPRESSIVE WIDTH of 2 1/2 inches! Each blade has a slit along its side, and posseses a set screw along its side, which ALLOWS THE USER TO LOCK THE BLADE POSITION closed, fully open, or at any point in-between. This instrument is finely crafted for the medical field and is composed of High Quality Medical-Grade materials.