Question: are you shorter at the end of the day?
Answer: Most adults get about 1% shorter over the course of a typical day. While one sleeps, the intervertebral discs absorb water, swell up a bit, and we regain that height. ... If you are, say, 178 cm (5 ft 10 in) tall at your morning height, you'll be about 1.8 cm (0.7 in.) shorter by the end of the day.