query: SELECT DISTINCT ?item ?itemLabel ?len ?unitLabel
  WHERE 
  {
    ?item wdt:P31/wdt:P279* wd:Q12280.
    ?item p:P2043/psv:P2043 ?length.
    ?length wikibase:quantityAmount ?len.
    ?length wikibase:quantityUnit ?unit.
    filter(?unit = wd:Q3270676)
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  