"Duża kaczka i mała ryba"

Translation: A big duck and a small fish

[PolishBagel]

Who will win? Tune in next time to find out!

[Osyrus]

Plot twist... The duck turned out to be evil and ate the fish...

[Avel704653]

I love the duolingo comments

[Sean136790]

.... walk into a bar...

[Alex608940]

When do you use wielki and when duży?

[Jellei]

"duży" just means "big" or "large".

"wielki" is a difficult word to translate. It's something between "big" and "huge" and yet none of those really seem to be good translations in my opinion. It also means "Great" like in "Alexander the Great" = "Aleksander Wielki".