NOTE1. PLEASE MEASURE YOUR PET BEFORE YOUR PURCHASE ESPECIALLY ATTENTION THE SMALL SIZE.2. Please allow slight deviation for the measurement data due to manual measurement.3. Recommended for dogs under 16 lb.GEEPET Pet Dog Front CarrierThis an unique hand-free pet dog carrier that allows you and your pets to be more comfortable.Front pack design easier for you to take care of your pet. You can also take it as backpack.Wide, adjustable straps with added padding1.5" wide adjustable straps with comfort pads, the straps will never cut into your back/shoulders any more.Legs-out designBenefited with this design, it keeps the legs of your pet out to ensure comfortable for your pets, and the safety for your pets is also guaranteed when you are walking.Easy-in and outNice for walks, bike rides and other outdoor activities, never leave your puppy alone when you you're out on an adventure!Two side zippers makes it easy-in and easy-out when you use it for your pets.How to choose the sziePlease take note of the max chest grith and distance bettwen front and back legs, S: Max chest girth--14inch, ditance bewtten front and back legs--3 inch, suggested weight:under 5.5lb petsM: Max chest girth--16inch, ditance bewtten front and back legs--4.5inch, suggested weight:5.5--9 lb petsL: Max chest girth--19 inch, ditance bewtten front and back legs--5.5inch, suggested weigth:9--14 lb petsXL: Max chest girth--21inch, ditance bewtten front and back legs--6inch, suggested weight:14--16lb pets