LONDON — The peaks are slimmer and the valleys are wider, but the price hasn’t changed.

The maker of Toblerone, the Swiss chocolate bar, has reconfigured the unique appearance of two of its milk-chocolate versions, with narrower triangles and a larger gap between peaks.

The price for the new bars is the same as the old ones, but the changes to the smaller one — which is sold mainly in Britain at the discount retailer Poundland — were so pronounced that Toblerone’s Facebook page was filled with outrage from aggrieved consumers, even though only a relatively small number were likely to be affected.

“Toblerone is all about the triangle,” Stephen Mason said on Facebook. “Why couldn’t you just lose a triangle at the end or make the triangles smaller?”

The 170-gram and 400-gram milk chocolate bars (about six ounces and 14 ounces) have been cut down to 150 grams and 360 grams to reduce costs, because of rising prices for ingredients, said Mondelez International, which makes the bars. The altered shape is visible only once the box is opened.