What's the size of the Joolz Essentials sheet? The size of the Joolz Essentials sheet is 70x65 cm. It's suitable for each Joolz model. Related articles What's the size of the Joolz Essentials fitted sheet? Can I bring my Joolz Aer along as cabin luggage? How long can I use the Joolz Hub cot, cocoon and seat?