gistfile1.txt

{
  "query": {
    "custom_filters_score": {
      "query": {
        "match_all": {}
      },
      "filters": [
        {
          "filter": {"term": {"size": "M"}},
          "boost": 10
        },
        {
          "filter": {"term": {"size": "XL"}},
          "boost": 100
        }
      ]
    }
  }
}