XL-XXXL Medium Large Pet Dog Foldable Reflective Slicker Rain coat/Soft Mesh Lining for Big Poodle,Shetland Sheepdog,Golden Retriever ect Waterproof rain jacket help to keep pets dry and comfortable in wet weather Elastic leg straps and adjustable Velcro belly strap ensure a secure and comfortable fit. Added reflective strip on leg and back provides extra visibility in the rain. Sizing for each dog is unique. We highly recommend you measure your pet precisely with a flexible tape measure to ensure an accurate fit. We recommend one size up for comfort if your dog's Size XL:Neck 18"/46cm ,Back 20"/51cm,Chest 27.5"/70CM; XXL:Neck 20.4"/52CM ,Back 22.8"/58cm,Chest 33"/84cm;XXL:Neck 23.5"/60CM ,Back 26.7"/68cm,Chest 37"/94cm