Black Block Heel Ankle Boots Chunky chic is at the forefront of every high-end collection this season, and Carvela's new Tip Toe boot is every bit as spirited as its name suggests. Crafted in the black leather for premium elegance, this fresh spin on the Chelsea boot features a croc print panel at the back and the added bonus of a zip, making them super simple to slip on and off. The blocky 85mm heel might seem vertiginous at first, but a subtle platform shaves off the drama to make them endlessly wearable.