Puppia – Dog Puppy Soft Harness – Junior – Beige – XS, S, M, L, XL Comfy & StylishMade of cushy polyesterPressure evenly distributed on the chestAdjustable Chest BeltNo more choking Matching leash available in our Ebay Store! When measuring your little dog for the Soft Harness, keep in mind that the neck is NOT adjustable and must fit over your dogs head My 12 lb shih tzu wears a size medium in this harness. SizeNeckChestX-Small Small8″ 9.8″10″ – 14″ 12″ – 15.5″ Medium Large11.8″ 14.2″ 15″ – 23″ 19″ – 26″X-Large15.7″ 22″ – 30″