Cramped means so small that there is no room to move. A cramped flat, cramped conditions, feel cramped.
It describes the effect on the person rather than the measurement — a room is cramped when it stops you doing what you want in it, which is why the same space can be cramped for one use and fine for another. Of handwriting it means small and squeezed. Note cramp, the muscle spasm, which is the same word.
1adjectivecrampedSo small that there is no room to move.
“Six of us shared a cramped flat with one tiny bathroom.”
synonyms: poky, confined
cramped is a quality of confinement.