close-fitting case
nounUK /ˌkləʊs ˈfɪtɪŋ keɪs/
US /ˌkloʊs ˈfɪtɪŋ keɪs/
A case that fits something tightly and snugly.
She slid her phone into a close-fitting case so it would not get scratched.
OTHER MEANINGS
2. A protective cover shaped exactly to the object it holds.
The close-fitting case for the glasses kept the lenses safe in his bag.
3. A container that leaves little empty space around its contents.
The close-fitting case held the violin without any room to shift.
4. A tight outer layer or jacket around a device or part.
A close-fitting case around the battery keeps dust out.