If your remember Windows 10 Mobile‘s earlier preview builds supported some new Tile Sizes including the “Large Tile”, which is like Four small tiles put together. Later these tile sizes were depreciated from the newer builds and if you check the latest builds like Build 10536.1004, you won’ be able to resize tiles to “Large size”. But if the official documentation has to be taken into account it seems, we will see Large Size Tiles option available along with other three commonly used Tile Sizes.
While this is not a must have feature, but many would like such a tile size for specific apps like Photos, Music and others. Microsoft is set to announce Lumia 950, Lumia 950 XL and Lumia 550 during October 6 event and one can also expect more news about Windows 10 Mobile availability on this date.