In the recipes metric ingredients are given first, with imperial in brackets. You will get good results using either metric or imperial measurements provided you use the same unit throughout.

Diameter for Cake Tins, Flan Rings, Pie Plates Metric Imperial 15 cm 6 inch 18 cm 7 inch 20 cm 8 inch 23 cm 9 inch 25.5 cm 10 inch 28 cm 11 inch 30 cm 12 inch	Diameter for Cutters for Scones and Biscuits Metric Imperial 2.5 cm 1 inch 5 cm 2 inch 6.5 cm 2½ inch 7.5 cm 3 inch
Capacity for Pudding Basins, Pie Dishes and Saucepans Metric Imperial  450 ml ¾ pint  900 ml 1½ pint  1.2 litre 2 pint  1.5 litre 2½ pint  1.8 litre 3 pint  3 litre 5 pint  4.2 litre 7 pint	Thickness for Rolling Pastry, Dough, etc. Metric Imperial 2.5 mm inch 5 mm ¼ inch 1 cm ½ inch 1.5 cm ¾ inch