My 70 lb Doberman is hard to fit and the Climate Changer fleece works great! There’s enough room for her deep chest and the side zip makes it easy to take on and off. The quality is great - soft, snuggly and warm - and it washes easily. I bought her a second one and bought one for my smaller 23 lb goldendoodle. For my 70 lb doberman size L works great. For my 23 lb goldendoodle I went with a size S. Thanks, Ruffwear, for the great quality, thoughtful design and fun colors/patterns. Make sure you keep a “girl” option in the color and pattern mix please : )