Scale Picture on Picture entity card

Hi Volks,
i use a Picture entity card to show the actual price for the Gas. Now i have insert a picture of the Gasstation but it will not scale to the right height and width.
can somebody help me plz.

image

show_state: true
show_name: true
camera_view: live
type: picture-entity
image: /local/pict/aral.png
entity: sensor.aral_altenberger_strasse_93_diesel
grid_options:
  columns: 4
  rows: 2
name: " Diesel"
aspect_ratio: 80%