[b]Shikishi[/b] 色紙 (しきし) is a particular format of paperboard for art, [[calligraphy]], [[poem|poetry]] and [[signature|autographs]]. Recognizable by its squarish dimensions, it also has characteristic edges which are often evident in posts that are [[photo (medium)|]]s of [[traditional media]] pieces.

As it is popularly used by artists drawing sketches to give away at conventions (e.g. pool #1135), the term is sometimes used to describe such drawings as well. These are often autographed, dated and/or inscribed with the name of the convention (and artist's booth number). [[marker_(medium)|Marker]] is a common medium for these.

[i]Sanseido Daijirin[/i] gives two dimensions for shikishi: 19.4×17 cm and 18.2×16 cm. Some pixiv taggers will use 「小色紙」 ("small shikishi") for the smaller size. Variants may be colored, have pre-printed elements, or may even have gold or silver leaf embedded in the paper. Fancy [[novelty_shikishi|novelty]] types are sometimes used; these may come in a different shape (post #1952713) or expose a differently shaped drawing area instead of the full card (e.g. post #523719). 

Not to be confused with irogami 色紙 (いろがみ), colored paper commonly used for crafts and origami.

For some 'shikishi' present in drawn images, use [[shikishi (object)]].
色紙 色紙絵