Changing font-size:
This operation may be applied to:
- state-badge;
- state-label;
- service-button.
For “state-badge” & “state-label” the "font-size" style must be used.
For “service-button” - the "--mdc-typography-button-font-size" variable must be used.
Note that changing the font-size for a badge causes a scaling the badge too.

type: picture-elements
title: ''
card_mod:
style: |
ha-card { height: 320px !important; }
elements:
- type: state-badge
entity: sensor.cleargrass_1_co2
style:
top: 12%
left: 10%
- type: state-badge
entity: sensor.cleargrass_1_co2
style:
top: 12%
left: 40%
font-size: 10px
- type: state-badge
entity: sensor.cleargrass_1_co2
style:
top: 12%
left: 80%
font-size: 20px
- type: state-label
entity: sensor.cleargrass_1_co2
style:
top: 30%
left: 10%
- type: state-label
entity: sensor.cleargrass_1_co2
style:
top: 30%
left: 40%
font-size: 10px
- type: state-label
entity: sensor.cleargrass_1_co2
style:
top: 30%
left: 80%
font-size: 20px
- type: service-button
title: Command
service: homeassistant.update_entity
service_data:
entity_id: sun.sun
style:
top: 40%
left: 10%
- type: service-button
title: Command
service: homeassistant.update_entity
service_data:
entity_id: sun.sun
style:
top: 40%
left: 40%
'--mdc-typography-button-font-size': 10px
- type: service-button
title: Command
service: homeassistant.update_entity
service_data:
entity_id: sun.sun
style:
top: 40%
left: 80%
'--mdc-typography-button-font-size': 20px
image: /local/images/white.jpg