that points here…Is it possible to change header card icon based on entity state? - #2 by Ildar_Gabdullin
and no says nothing on icon size 
o wait, maybe you mean this one 🔹 Card-mod - Add css styles to any lovelace card - #7204 by Ildar_Gabdullin
mm, nothing obvious there either. let me find that ha-state-icon
bingo:
- type: heading
heading: Ophaaldata
heading_style: title
card_mod:
class: class-section-heading
style:
.badges hui-heading-badge:nth-child(1) hui-entity-heading-badge $: |
ha-state-icon {
--mdc-icon-size: 38px;
}
.: |
.badges hui-heading-badge:nth-child(1) hui-entity-heading-badge {
--card-mod-icon: {{states('sensor.volgende_afval_icon')}};
--card-mod-icon-color: {{states('sensor.volgende_afval_kleur')}};
}
Ive set it out of proportion, to show the option clearly. What’s nice is the rest of the header isnt blown up btw.
next up Ill FR the capitalization of those states, this looks really bad, and not like the second one, which is transformed correctly in the Frontend
