Fantastic useful little book. It really is pocket size and can also fit inside your handbag so that you can take it everywhere with you, i.e. food shopping, on holiday, restaurants, eating out at friend's houses, parties. This way you can always keep a check on how many calories you are consuming as almost every item of food is alphabetically listed with their porton sizes, calorie per portion, carbs, fat and fibre. It's also great value for money. They also make a great gift for all your friends who want to start a diet!