S size: 3500 yen M size: 4500 yen Set: 7800 yen I initially purchased the M size, but it was too big, so I bought the S size. However, neither size fit me well, so I am selling them. 【Usage Period】 ・S size: About 2 months ・M size: About 1 week The usage period coincided with a time when my child was shedding a lot of hair. Due to the material, hair tends to get trapped in the pillows, so some hair remains on both pillows. I will remove as much as possible before handing them over, but please refrain from purchasing if you are concerned.