agree, the first thing I would do is to measure to make sure they are all the same size. Often they are an odd size or you have to give up part of the border to cut them apart and get the right seam allowance.
However, from looking at that one, it looks to be easier than most since they all look the same size.
I would add a border to get them to a standard size though if they aren't already. Then you can use any pieced blocks that fit the same size.