The chain is short and non ajustable but perfect by itself or for layering. Pendant Size: 1,5 cm Material: 18k Gold Plated Chain and Golden Metal Pendant Chain Length: 40 cm THIS IS AN ORIGINAL CREATION OF MORE THAN ONCE , WE DO PROVIDE A CERTIFICATE OF AUTHENTICITY TO CERTIFY THAT THE BUTTON USED IS AN AUTHENTIC ONE. WHEN YOU BUY ONE OF OUR CREATIONS, IT IS A MORE THAN ONCE UPCYLCLED PIECE AND NOT A CREATION OF THE BUTTON BRAND. Metal, Necklace, Gold Plated Chains, Chain Lengths, Layering Pendant, Pendant, 18k Gold, Gold Plate, Gold