Fosinz Outdoor Adjustable Backpack for Dog with Small/Medium & Large Size ?Large Size,For Size M: Chest Girth 28.2"-31.8",Stomach 19.6"-25.6",Neck 19.6"-24.4" ,Bag Length 6.69"*9.4".All the detailed size is shown in our picture. ?This adjustable dog backpack is ideal for dogs weights from 50 to 90 pounds,adjustable saddlebags system for a customized fit. ?Convenient pockets for carrying food, water, and gear for you and your pet when you're walking,travelling or camping etc.This dog backpack with weights is good for for you and your pet outdoor hiking. ?Balanced assistance handle helps lift dog up and over obstacles when you are outward hounding.Backpack with reflective strip is cool and enhance visibility. ?Balanced assistance handle helps lift dog up and over obstacles when you are outward hounding.Backpack with reflective strip is cool and enhance visibility.