How long will a diaper last?

I found out the hard way. Two nights ago, I changed Caroline's diaper and put her to bed around 8:00. She woke up to nurse at 2:00 am and 6:45 am and promptly fell right back to sleep, so I didn't see the point in waking her up with a diaper change. After, the 6:45 feeding, she slept until 10:00 am, which she has never done before. When I went in to get her, the front of her PJ's was soaking wet and I first thought she was sweating. But then I realized that, no, I had left her in the same diaper for 14 hours and she was sleeping in her own pee. Lovely. The great thing is, it didn't bother her at all. She woke up smiling. Oops.