Mondelez International has increased the gap between the peaks as a cost-saving measure to reduce the weight of its bars.
Mondelez International, which makes the bars, said it had been forced to make the distinctive triangular bars smaller because of rising costs.
Richard Cristiano Tamerighi said it was "just plain dumb changing the trademark shape of your flagship product".
The BBC reported consumers took to Toblerone's Facebook page to question why the company had chose to make the gaps between the triangles bigger, rather than reducing the length of the bars.
Lee Yarker said: "Fair enough reducing the weight of the bar, but why the big gap in between segments?"
Garry Cornell wrote on the Toblerone Facebook page: "Terrible decision".
We have looked at the struggle to snap of a piece as just one of those silly things you have to go through to get chocolate into your mouth.
A bar of Toblerone is an absolute delight, signifying the joy of travel (every time you head to an airport, you know you're buying a few giant blocks of the stuff) as well as general chocolate deliciousness.
Cathy White said: "It looks awful".
However, other consumers praised the company for making a public announcement on the change.
"Like many other companies, we are experiencing higher costs for numerous ingredients".
The makers of Toblerone have faced a backlash from customers after reducing the size of two of its bars in the UK.
A Mondelez spokeswoman told the BBC the change "wasn't done as a result of Brexit', but acknowledged that the foreign exchange rate is 'not favourable" at present.
While denying that the reductions were related to any consequences of Brexit, Mondelez said on Tuesday that Toblerone bars would continue to be sold elsewhere without changes.
Walkers and Birds Eye have both said they are set to raise the prices of some items following the drop in the United Kingdom exchange rate post-Brexit.
Unilever (ULVR.L) was the first to move with an attempt to impose 10 percent rises on a host of big brands like savory spread Marmite, Pot Noodle and Magnum ice cream last month, triggering a dispute with supermarket group Tesco (TSCO.L).