<br>Size----Neck-------------------Chest-------------------Body-------------------Weight<br><br>XXS------16cm/6.3inches------26cm/10.2inches----- 17cm/6.7inches-------- <1.6lb <br> <br>XS------19cm/7.5inches------28cm/11inches----- 20cm/7.9inches-------- 1.6-3.3lb <br> <br>S-------22cm/8.7inches------34cm/13.4inches----- 24cm/9.5inches-------- 3.3-5.5lb<br> <br>M------24cm/9.5inches------42cm/16.5inches----- 30cm/11.8inches------ 5.5-8.8lb<br> <br>L-------28cm/11inches------46cm/18.1inches----- 34cm/13.4inches------ 8.8-13.2lb <br> <br>Please CHECK dimensions carefully before you decide which size to buy.<br> <br>Size up if your pet's body length is longer than normal. <br>