  Lattice QCD simulations tend to get stuck in a single topological sector at
fine lattice spacing, or when using chirally symmetric quarks. In such cases
computed observables differ from their full QCD counterparts by finite volume
corrections, which need to be understood on a quantitative level. We extend a
known relation from the literature between hadron masses at fixed and at
unfixed topology by incorporating in addition to topological finite volume
effects, also ordinary finite volume effects. We present numerical results for
SU(2) Yang-Mills theory.
