what is the size of an rv king bed?
The most popular RV mattress sizes are: 1  Queen Short: 60x75. 2  Three Quarter Size (also known as an antique size): 48x75. 3  Twin Size: 38x75. 4  RV King: 72x80.  Regular Queen: 60Ã 1 80. Full Size: 53 2 x75. Regular King: 76 x80.