The Mobius strip (M?bius?strip,?M?bius?band) is a one-sided, non-orientable surface. It was named after the discovery by A.F. Mobius (August? Ferdinand? M?bius,?1790-1868).

The specific method is to fix one end AB of a rectangular paper strip ABCD, twist the other end DC half a turn, and then glue AB and CD together? The resulting curved surface is a Mobius circle, also known as Mobius strip.