Womail Puppy Clothing, Summer Pet Apparel Cute Cotton Waist Coat Vest T-shirt for Small Dog Blue Size_M:_Back Length:31CM/12.2"_Chest:30CM/12"_Neck:32CM/13" Size_L:_Back Length:38CM/15.1"_Chest:36CM/14.2"_Neck:32CM/13" Size_XL:_Back Length:42CM/17"_Chest:38CM/15.1"_Neck:34CM/13.4" Size_XXL:_Back Length:42CM/17"_Chest:40CM/16"_Neck:34CM/13.4" Please check the size chart to choose the right size.