Resizing custom button-card in stack

Configuration Frontend
1

Hello,
how can I resize these buttons in a vertical stack? They are wasting double space…
Thank you

type: grid
cards:
  - type: custom:button-card
    template: luci
    entity: light.luci_sala
    icon: mdi:sofa
  - type: custom:button-card
    template: luci
    entity: light.luci_cucina
    icon: mdi:stove
  - type: custom:button-card
    template: luci
    entity: light.luci_camera
    icon: mdi:bed
  - type: custom:button-card
    template: luci
    entity: light.luci_bagno
    icon: mdi:shower
    name: Luci Bagno
  - type: custom:button-card
    template: luci
    entity: input_boolean.luce_scrivania
    icon: mdi:desk-lamp
  - type: custom:button-card
    template: luci
    entity: light.led_sala
    icon: mdi:led-strip-variant
  - type: custom:button-card
    template: luci
    entity: light.led_cucina
    icon: mdi:led-strip
  - type: custom:button-card
    template: luci
    entity: light.yeelight_led_tv
    icon: mdi:television
columns: 2

and this is the button template:

button_card_templates:
  luci:
    type: custom:button-card
    icon: mdi:sofa
    color: auto
    color_type: card
    size: 40%
    aspect_ratio: 2/1
    hold_action:
      action: more-info