also: スリッパー
noun
slipper; slippers
Indoor slippers worn in Japanese homes, schools, and some workplaces. Often used in the plural form in English but the Japanese word is the same.
家に入るときはスリッパに履き替えてください。
Please change into slippers when you enter the house.
学校のスリッパはサイズが合わなかった
The school slippers didn't fit.