This portion guide shows you the approximate number of portions you will get from the majority of cake sizes and flavours. Fruit cakes serve more as they are based on a smaller portion due to the richness of the cake. Sponge cakes are based on 1″ x 2″ portions and fruit cakes are based on 1″ x 1″ portions. If you are going to feed a hungry cake loving bunch you may wish to order the next size up to make sure there is enough cake to go around!