I wear a size 8,5 bruton boots? SIZE-...
I wear a size 8,5 bruton boots? SIZE- S,M or L?
Run the medium. Mediums are sizes 8-10 in mens. It does depend somewhat on which boots you have. If you do have boots that are built on a size smaller outsole, i.e. all 2011 burton park boots and all forum mens boots, you could go with the smalls. To be safe I would go with the mediums.