With king mattress size options these days, you’ve got territories, states, and split surfaces all involved. Standard king mattresses may also go by another name, known as Eastern king. Courtesy of Wolf Wolf King Size Hybrid Mattress $1,099 WolfCalifornia king mattresses are a bit longer than standard mattresses (not unlike the actual state of California). Not to worry, though, because as specialty king mattress sizes become more popular, the offerings are becoming more plentiful. Also, where do you even get sheets for an Alberta king or Alaskan king mattress?