I purchased an item on Mercari that was described as "worn a few times and dry cleaned." It looked as good as new, but the smell of the antibacterial detergent was strong. To remove the odor, I've washed it by hand about 20 times with soap. I've worn it about 5 times. The smell of the antibacterial detergent is still lingering, and I can't stay home all day on the days I wash and dry it, so I've given up on wearing it. I'm chemically sensitive, so it bothers me a lot, but I think it probably wouldn't bother most people. The size is S, but LilySilk's S size is large, so it's probably equivalent to a general Japanese M size. I have other silk pajamas from Gunze and Wacoal, and another set from LilySilk, but LilySilk is by far the best.