Geodeulji is a small piece of white cloth to attach to the edge of sleeves[1] of hanbok, traditional Korean attire.

Its inner is back up by changhoji (창호지), a type of Korean paper and its width is about 6 ~ 8 cm.

[2] Although geodeulji was originally only allowed for yangban women (nobility) to use, since about 1900, it began to be used by commoners who could not have a ceremonial clothing like hwarot or wonsam.

They put it on their outer jeogori (a short jacket) for their wedding ceremony to represent the robe as a formal attire.

In addition, hansam (한삼), fabric extension attached to the sleeves of wonsam or hwarot is sometimes called geudeulji as well, because the two are similar in usage.