TORONTO — Coffee lovers at two Ontario Tim Hortons outlets may soon be doing a double take at their double-double.

The popular chain is brewing up something new using outlets in Kingston and Sudbury as test markets.

Tim Hortons spokesman Nick Javor says the company is introducing a new extra-large cup size which will hold 24 ounces (710 millilitres).

It will also be changing the names of all the cups to make room for the new extra-large, which will cost $1.90 plus tax.

Javor says the 20-ounce (590 ml) will now be known as large, the 14-ounce (414 ml) will be medium and the 10-ounce (295 ml) will become the small.

At the Kingston test outlet, the eight-ounce (240 ml) size will be called an extra small but at the Sudbury outlet, it won't be on the menu at all.

The prices for each cup size will not change.

Javor says research shows customers' tastes are moving to larger sizes. He says it will test the two markets for about a month to see what the reaction is.

Ordering a Monday morning double-double could get a little confusing for people in two Ontario cities, the test markets for Tim Hortons' new cup sizes.