Devil Mountain Maar is wide and deep, while North Killeak Maar, South Killeak Maar and Whitefish Maar are , and wide and the Killeak Maars reach depths of over ; Whitefish Maar is much shallower with a depth of . Such dimensions make the Espenberg maars the largest on Earth and the Espenberg maars comparable in size with calderas; other maars at lower latitudes are much smaller. The maars are mostly circular with the exception of Devil Mountain Maar which is partly separated by a small sand spit into the northern wide North Devil Mountain Maar and the wide South Devil Mountain Maar; formerly they were considered to be two separate maars.