Mandolin Instrument Pin Hat Tac Enamel Backpack Flair measures about 1.12" made of metal metal butterfly backing Yes, we combine shipping! Use the "Add To Cart" button. (ask for invoice before paying) (Automatic shipping calculated when buying 10 or less enamel pins/earrings) Whether you buy 1 pin or 4 pins, your shipping cost will be the same. If automatic combined shipping is not working, please request invoice before paying. Payment must be made no later than 48hrs after auction ends or purchase is made. Please ask questions, we want you to have a great experience. Thanks! (prices are subject to change) (listings subject to early end) Remember to check our promotions page in our store, for all the latest savings and coupons!