Please measure your Puppy’s chest, neck and back lengthFor the growing puppy, you’d better choose the bigger size.If you hesitate between two sizes, choose the big one. 2 Packs Lovely Dog Dog Recovery Onesies In The Package,Which Is Easy For Washing And Replacing. Besides That, It Is A Great Way To Save Money Or Those Family Who Has 2 Dogs. Easy To Wear And Take Off: Design Of A Row Of Buttons,It Is Not Easy To Shed And Stick Hairs. In Addition, The Edges Of The Dog Medical Suits Are Hemmed, So It Is Not Easy To Lose The Thread. Pls cut the oval circle for boy dog goes pee, while girl dog doesn’t need. The Recovery Suit Will Prevent Pet From Licking Wounds, Hot Spots, Allergies It Is Great For Patients To Recover After Surgery , Comfortable And Anti-Harassment And Keep Your Dog Cat Calm And Relieve Stress. Our dog recovery suit after surgery allow dogs to move freely such as daily walking, sleeping. Both male & female dogs can go to the toilet without