Fifteen and a Half Inches
That line is the only thing in the warm version of this story that is exactly, word for word, true.
Everything else got moved or inflated or tidied.
That one is correct and it was said by a thirteen-year-old girl in a wrecked chair to a thirteen-year-old boy on his knees on a carpet, and it was the first thing she had said to him in nine weeks.
I have thought a lot about why she chose that sentence.
Because look at what it does.
It is a joke about the thing nobody in that room could mention.