It's possible for a KEY to be over 10 feet big, but it would be a little strange.
weird - but more broad than the related term 妙. 奇妙 means unusual and absurd - a street-person wearing a duck as a hat is 奇妙.
BOOBOO: if you want to say you're curious about a specific thing, you'd use 興味 （きょうみ） instead.
好奇心 usually means "curiosity-in-general": you have an inquiring personality, or a gaze of curiosity on your face. You'd never say, "Oh, you play in a band? 好奇心ある！”
You get close to a guy with a CROWN (because you're a gold-digger).
If a guy has NO CROWN he must be strange, so just walk by like your shit don't stink.
妙な 奇妙な 不思議