Will Burton Misson bindings in size M fit 10.5-11 size boots?

i'm buying a used snowboard tomorrow which comes with Burton Mission bindings. the person i'm buying it from said that the bindings are size M/L but it seems that these's no such size exists, they either come in M or L. I know the large ones will fit 11 size boots easily but what if they are mediums, would i be able to use them with 10.5-11 size boots? Thanks in advance.