I just thought I'd put these pictures up so those who'd never seen formal Yoruba dress before might get a feel for what it's like. As you can see, it's nothing like the loincloth-wearing "Africans" of Hollywood movies or National Geographic covers; there's a tremendous amount of cultural variety on the continent, even within Nigeria alone, and the traditional dress of, say, the Igbo, the Edo or the Urhobo would be very different.
This particular outfit, called an "Agbada", can actually be bought online, for the low, low price of $590!*
And below is an example of a female outfit; the dress itself is called a "Buba", the wrapper on her shoulder (which is actually worn round the waste, geisha-style) is called an "Iro", and the headpiece is called a "Gele"; the one she's wearing is actually a fairly straightforward example, as these headpieces can get extremely elaborate indeed.
This too can be bought online, for only $350.
PS: This picture from the 1960s depicts Edo women dressed in traditional garb. Note how different it is from the Yoruba garb above, despite the fact that the Edo are to be found right to the east of Yorubaland.
*No, I don't have any financial relationship with the site in question. It would be nice if I did though, don't you think?