How can i resize the Cell Size for a Grid Layout Group

Hi,

I am using Unity 5, and working with a Grid Layout Group, I am making an iPhone app, and the grid looks perfect in the game view on 9:16 and looks good on the Unity Remote 4 app. However when i build and deploy to my iPhone with xCode, the grid is extremely small.

Is there a way to have the grid mind a ratio or percentage of the screen?

Ended up going with a Horizontal Layout Group followed by several Vertical Layout Group within.

Use layout Elements on the children to fix their sizes. Else the Grid will auto-resize the grid.
You can also combine with a ContentSizeFitter on the grid to make it resize itself to the size of its children