ANSWERS: 1
  • Queen size mattress sets are 60 inches wide and 80 inches long. Twin box frames are 39 inches wide and 75 inches long. Their combined width--78 inches--is approximately the width of a king size mattress--76 inches--although they'd be a bit shorter--5 inches--than a king, which is 80 inches long.

    Source:

    Dormia.com: Mattress Sizes - Dimensions

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