These new X and Y pins are just suburb. They have a lovely color to them and will go with anything. We are pricing these as the "best deal around." They may be purchased separately or as a pair - either way these are fun items to wear or give as gifts. To give you an idea on size, the X chromosome is just a bit more than 3/4's of an inch long, so they make a statement without being overpowering. Each has a normal pin attachment on the back (we did not show the attachment.) You just can't go wrong with the quality or the price on these chromosomes.