All my recipes are developed using a digital scale and the metric system (grams and millilitres). Cup measurements are available as a conversion but these, unfortunately, won't always be as accurate. For best results, I always recommend baking with a digital scale.
You can make your mince pies as big or small as you like. The cutters suggested make nice little puff pastry mince pies which are great for individual portions but if you prefer a larger mince pie then use larger cutters - just be sure to fill your mince pies with more mincemeat and adjust your baking time.