Ö
Circle and dots, though so potential.
Ö
I got once the idea to put just the single letters on tees… message or even single word seems sometimes too much. And then it started to happen. I was walking with 2 friends one evening, she was Estonian as I am and the other was foreigner. At her home gate I wished “head ööd” which means “good night”. Our friend commented that he would like to learn some Estonian and I knew instantly which word to start with - öö. Next moment I realised how good it would “work” on tee. As there is T-shirt… there might be Ö-shirt. It sounds like night-shirt in Estonian, well-known clothing some people sleep with.
Ö-shirt is suitable to wear at night anywhere anyway.