Big
Large
The big radical and the big kanji are exactly the same!
たい, だい
おお
ひろ
There's this big guy (that's how you remember the radical, remember?), and he's wearing a huge Tie Dye (たい, だい) shirt. Because he's so huge, the tie dye shirt is also super huge. Everything about him is pretty big, but the tie dye stands out more than anything.