Ohashori

For the longest time I had no idea what that "flap" of fabric was below the obi. Do you see it? It's like a fold.

(Image source here.)

For years I didn't know what that was. Now I do. I can't remember how I learnt it but it was finally shown to me that it's the kimono folded underneath itself and tied up under the obi. This picture below has it labeled as the "ohashori".

(Image source here.)

Since kimonos have been made a standard size for a while, I can imagine that this fold naturally came about as a means to make the garment fit the individual wearer.

Now here's me in a yukata! I bought it from a vendor at Anime Revolution 2012 (but just the robe part. I didn't buy the obi).