Red meat
According the the British Heart Foundation, a serving of red meat should be roughly the size of a deck of cards.
But with the size of the average dinner plate increasing by a third in the past 50 years, it can be hard not to pile on the food.
The British Heart Foundation says a dinner plate measured roughly 23 cm across in the 1960s, while today, most are about 30.5 cm in diameter.
Oily fish
While oily fish is a great source of omega 3 fatty acids, which can help to prevent heart disease, nutritionists say we should limit our portion to the size of a mobile phone.
Chocolate
Chocolate fans beware, British research has revealed a serve of your favourite sweet treat shouldn't be any larger than a tube of lipstick.
Chicken
Next time you tuck into a roast meal, watch your chicken serving, nutritionists say. British experts say a serve of chook shouldn't be any bigger than a bar of soap.
Other portions mentioned included restricting a serving of raisins to the size of a matchbox, peanut butter to the size of a golf ball, and a serving of potato to the size of a computer mouse.
-nzherald.co.nz