fixed-width area
nounUK /fɪkst wɪdθ ˈeəriə/
US /fɪkst wɪdθ ˈeriə/
A fixed-width area is a space that always stays the same size, no matter what you put inside it.
The form has a fixed-width area for your name, so long names get cut off.
OTHER MEANINGS
2. In computing, a text field or column that always uses the same number of characters.
The database stores each ID in a fixed-width area of ten characters.
3. In design, a section of a page that keeps a set width instead of stretching.
The sidebar is a fixed-width area, while the main content grows with the window.
4. In printing, a block of space reserved for text that never changes size.
The label printer uses a fixed-width area for the price.