LENGTH: Each roll measures 32 feet/10M long. IDEAL SIZE FOR PAPER CIRCUITS: Our 4mm wide copper tape is thinner than standard tapes, making it especially handy for paper circuits! CAN BE SOLDERED: Copper tape can be soldered to create beautiful circuits Use our roll of copper tape to make even more light-up creations with our circuit stickers. Our 4mm wide copper tape is thinner than standard tapes, making it especially handy for paper circuits!