They are the same as candy cane fences, as they also are linked together to protect candies and blockers within their radius, but the difference is that the candy cane curls can be destroyed.
Level 4448 - First level with candy cane curls order.
Level 4513 - The first jelly-order mixed level with candy cane curls order.
Level 5337 - The level that requires the least amount of candy cane curls for the order (only 4). Also the first level where candy cane curls are the only required element for the level.
Level 5921 - The first ingredients-order mixed level with candy cane curls order.
Trivia
Just like dark chocolate, this is a blocker that is a variant of an already existing blocker and can have up to three layers.
The three colours that make up this blocker are all secondary colours.
The outline of this blocker is purple instead of red (seen on candy cane fences).
Candy cane curls make up the numbers 109 to 120 in the tile map code. There are twelve types of candy cane curls, according to the code.