A flag is a craftable item. It can be made using about some lightweight fabric, some thread, a long wooden handle, a needle, and a knife with the sewing skill. (It may use whittling for the handle, but this is unconfirmed.)

Ingame description, made using red silk:

This is a piece of red silk cut into a rectangle; a series of ties sewn into
one of its shorter sides hold it snugly against a simple wooden staff. The
flag measures two handspans long on its shorter sides and half a stride
longways, while the flagpole is two strides long.

Crafting Skill: sewing
Tools Required: knife, needle
Materials: lightweight fabric, thread
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