| Subject | English | Japanese |
| comp. | n character width | 文字幅 |
| comp. | n double width character | 倍幅文字 |
| comp., MS | full-width character | 全角文字 (In a double-byte character set, a character that is represented by 2 bytes and typically has a half-width variant) |
| gen. | n full-width Roman character | 全角ローマ字 |
| comp., MS | half-width character | 半角文字 (In a double-byte character set, a character that is represented by one byte and typically has a full-width variant) |
| gen. | n half-width characters | 半角 (e.g. romaji) |
| gen. | n half-width Roman character | 半角ローマ字 |
| comp. | n width of character | 文字の幅 |