Leconpet Dog Aviator Hat, Dog Winter Pilot Hat with Ear Flaps for Cold Weather (XXL, Black)Brand: leconpet Color: Black Features: SIZEXXL, head size: 28. 3 inches(72CM), neck size: 21. 7 inches(55CM); The neck girth and head girth measured by after the two flaps are buckled. SIZE INSTRUCTION: Please refer to the size information and take each measurement a bit loosely. When you're buying a hat, harness or some cool doggie fashion, you'll want to make sure you measure your dog first. To properly measure your pet, please use a fabric tape