2D Objects not well placed in the grid

Hi I have followed the Board game tutorial and I have been able to place gameobjects. My concern is that the obj are not well placed. it’s seems that the grid - cell is too small. Check the pic70307-screen-shot-2016-05-14-at-101641.png

I was expected the grid to adapt itslef to the width and height of the prefab.

Any idea. the game is baed on 4 columns / 6 raws.

Merci

Is the “Pixel Per Unit” of the sprite the same across all your prefabs for your grid? If not, it could throw off the construction of your grid.