Hi there, I cut the bake into 12 pieces, but you are welcome to increase if you think 4.5cm x 6cm per piece will be too small and you would like to serve them a bit bigger. I think it depends on what else you will be serving your guests / family. If you are having a tea with a selection of sweet and savoury items, this size is good, or even smaller will work. If this is your main item then I’d increase the size.