We review the status of B-s mixing measurements from LEP experiments,
including new results from DELPHI. We briefly review the various exper
imental techniques used and their limitations and discuss the possibil
ities for improving these measurements in the near future. Including t
he new DELPHI results the combined world average limit on the B-s osci
llation frequency is Delta m(s) > 8.4ps(-1) at 95% CL.