I ordered 2 different sizes for 2 different dogs. XL ordered for a standard dachshund 10-11 kg (depending on how we eat and sell). Parameters: neck 37 cm, chest 51 cm, back 47 cm. It came perfectly in volume. The length of the back, of course, is short, but we are already used))) My Bunny is happy and I'm with him. Recommend! Delivery: ordered 28.03, sent the same day. Received in IT 15.04.