How To Style Marker

[Timileyin105]

hello awesome team

i have been looking for a way to style the marker icon but to no avail, please i need someone to help out on how i can add with and height to the icon and also some css styles. the "html style attribute not working".
//code
<ngui-map class="d-flex" style="height: 80vh"
zoom="13"
center="37.775, -122.434"
(mapReady$)="onMapReady($event)"
(mapClick)="onMapClick($event)"
(idle)="onIdle($event)"
>
<marker icon="assets/images/bike-icon.png" style="border-radius: 20px solid green;height: 30px; width:30px;" *ngFor="let
pos of positions"
[position]="pos"
(initialized$)="onMarkerInit($event)">

Thanks