Open packaging item, may require some assembly. See link for more details:

Size: 18" 

Note: Tested and works. Light marks on the top of the mattress, See pictures for details. 

https://www.target.com/p/intex-18-34-pillow-top-air-mattress-with-electric-pump-and-headboard-queen-size/-/A-83221902#lnk=sametab