Metal Collar Extenders, 2/pack Sale! from $ 5.90 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Metal Collar Extender with Spring No Sewing Required Attach by placing springs over the button & then insert collar extender button through shirt button hole. Add 1/2 Size to your shirt collar Easily hidden by covering it with a tie as usual 2/pack Tweet