Tiles can be small, medium, wide or large size depending on their Properties.ItemSize property value. Tile size is calculated based on the ITileContainerDefaultProperties.ItemSize property value. Wide Tiles are automatically sized twice as wide as medium Tiles, while large Tiles are twice as high as wide Tiles.
We recommend you only modify the medium Tile size to keep the Microsoft Windows 10 guidelines in your applications. However, you can use the LargeItemWidth property to manually set the large and wide Tile sizes as well.