auto-fitting

adjective
UK /ˌɔːtəʊˈfɪtɪŋ/
US /ˌɔːtoʊˈfɪtɪŋ/

Something that fits itself to you without you doing anything.

The auto-fitting helmet adjusts to the shape of your head.


OTHER MEANINGS

2. A computer feature that automatically sizes text or images to fit a space.

The app uses auto-fitting to make the picture fit the screen.

3. A machine setting that automatically adjusts parts to the right size.

The auto-fitting mode on the machine keeps the pieces snug.

4. The process of a device shaping itself to match a person or object.

Auto-fitting happens when the shoe molds to your foot.