how to place 2x N GRID IN IONIC 5 code example

Example: ionic grid

<ion-row>
    <ion-col size="12" size-md>
      ion-col [size="12"] [size-md]
    </ion-col>
    <ion-col size="12" size-md>
      ion-col [size="12"] [size-md]
    </ion-col>
    <ion-col size="12" size-md>
      ion-col [size="12"] [size-md]
    </ion-col>
    <ion-col size="12" size-md>
      ion-col [size="12"] [size-md]
    </ion-col>
  </ion-row>