Hi Eric, Thanks for reaching out to us!
The maximum rows and columns on a standard grid is 12 x 12 (144 cells), however you can insert even more cells by dragging your image between cells and to the edge of the collage (where the cell will turn blue as you drag the photo into position to indicate that you’re inserting).
Let us know if you have any other questions.
– Regards, The Ribbet Team
