Can you please tell me which of the two is better?
a polka-dotted T-shirt or
a polka-dot T-shirt?
a polka-dotted T-shirt
Since polka-dotted is used as an adjective, this is the right phrase. Polka dot is a noun.
a polka-dotted T-shirt or
a polka-dot T-shirt?
Since polka-dotted is used as an adjective, this is the right phrase. Polka dot is a noun.