Key hanger in the form of an ocean wave, print it in black and it might be a mustache 😁

There are two versions, one with and one without mounting holes which you can secure to the wall with double sided stickers like these for example https://s.click.aliexpress.com/e/_c45rO8ir or on amazon https://amzn.to/3QXKXtR these stick very well to most surfaces.