[RCQDnMp5]

I'd like to print a Thai symbol on a shirt I bought recently. But I'm not sure yet what kind of symbol I should take. It should be something decorative, which I could print out (small size) in black and white and iron on the shirt.
My first ideas were "garuda" (but I'm not sure if it's inappropriate??), the outlines of the country of Thailand, ... or maybe a short word / idiom / phrase in Thai... I have hundreds of ideas, but no idea which one to choose

Does anyone have any good ideas?

Any symbols which would not be ok to use? (I'm not thinking of using buddhist symbols in particular, though.)