middle-width
adjectiveUK /ˌmɪdl ˈwɪdθ/
US /ˌmɪdl ˈwɪdθ/
Not too wide and not too narrow, but in between.
She chose a middle-width ribbon for the gift.
OTHER MEANINGS
2. A size or measurement that is halfway between the smallest and largest widths.
The middle-width option fit the shelf best.
3. In typography, a character or stroke of average thickness.
The font uses a middle-width stroke for headings.
4. A moderate amount of space from side to side.
The path was of middle-width, easy for two people to walk.