The slippers are fine, just if you're used to wearing slippers that are "tight/fitted", take a size smaller than what you usually wear. I got them in size 45 and while previous Nike slippers I had in size 45 felt like wearing athletic shoes (in terms of fit), these are comfortable, they have room and I prefer them. For those who want slippers with a soft sponge insole, these don't have that.

Edit: 16/4/22. After a while, due to their material, they need a good wash because even if someone only wears them in the bathroom, they start to collect dirt and smell. Now I wash them about every 10 days. It's somewhat unrelated, but if laundry detergent spills on them, it's very difficult to remove. I don't remember if they come in other colors, I got them in white and to remove the stain from the detergent, I needed bleach. Anyway, they haven't suffered anything for so long.

I bought it recently in white color for the amount of 19.99 euros. It is very comfortable and worth its money. It has excellent quality, the only downside was that the size came out too big.