No, it's not just you. It seems that chocolate bars really are getting smaller.

Consumers have been feeling the loss as chocolate manufacturers struggle with the rise costs of cocoa.

Analysts at Euromonitor have issued a report, “In it for the money?” that addresses the effects of a steady rise in the price of the commodity - which in North America have increased by 27 per cent since 2010.

The predictable result for consumers is either smaller bars or higher prices.

Sharing bags are a common way to boost profits in the industry, with profit margins 25 per cent higher in Europe when compared with ordinary sized chocolate bars.

Manufacturers are hesitant to change ingredients, in case of turning off regular consumers with inferior chocolate.

Some, like Lindt, have successfully marketed luxury chocolate to a wider base,  and others have used fair trade certification to justify higher prices.