The size is S. This is clothing to be used after neutering. Regarding the white clothing: Since there is no opening for the dog's penis, it will need to be cut. See photo 6. The images are everything, so please check the details of the condition carefully. When purchasing, please check the images carefully. Due to work, replies to comments and shipping may be delayed. We will prioritize purchases even during comment exchanges. Thank you for viewing. No returns accepted.