Typical sizes Crib: 45″ x 45″ needs a backing measuring a minimum of 53″ x 53″ Lap: 50″ x 50″ needs a backing measuring a minimum of 58″ x 58″ Youth: 55″ x 72″ needs a backing measuring a minimum of 63″ x 63″ Twin: 66″ x 84″ needs a backing measuring a minimum of 74″ x 92″ Full: 82″ x 99″ needs a backing measuring a minimum of 90″ x 107″ Queen: 90″ x 99″ needs a backing measuring a minimum of 98″x 107″ King: 110″ x 110″ needs a backing measuring a minimum of 118″x 118″ Share this:ShareClick to share on Facebook (Opens in new window)Click to email this to a friend (Opens in new window)Click to share on Pinterest (Opens in new window)Like this:Like Loading...