Worldwide, サイズ (Size 
, Sidse 
, サイズ 
) is a rare epicene first name. The forename サイズ is habitual in Denmark, where it is a rare female name, South Africa, where it is a very rare mostly masculine, but uncommonly girly name, and Indonesia, where it is a very rare boy's name. Also, サイズ is the last name as well as the forename.