The small flower squares are about 7.5cm square and the big ones are about 15cm square. I have used 12 colours of wool, and have already run out of the cerise pink. A lot of the other balls have dwindled to very little, so not much more square crocheting left - because when the wool is finished, the blanket will be the size it will be.
The blanket may well end up being an odd sort of shape, rather than rectangular. I am not quite sure yet how all the squares will go together, but am quite liking the arrangement in this photo.