Wow-this bed is just huge! A standard crib sheet will not fit on this mattress. It does inflate in about one minute, and is very sturdy for an air mattress. The sheet it comes with is super cute and very soft. Be sure you have enough time to wash the sheet before using, because it has a strong newly-manufactured vinyl smell to it right out of the box. We actually aired the mattress and sheet outside before using it and before washing it. My son(almost three)likes to sleep on it, but still would rather sleep with Grandma and Papa when they visit.