ZOOBICO Dog Cap S Navy, Korea Adjustable strap allows for length adjustment. I bought this for my dog, but he hates hats and takes them off immediately, so I'm selling it. It's a stylish and very cool cap. My dog: Pomeranian, 2.8kg On my dog, the adjuster was at its tightest setting, and it fit just right. The adjustment string is slightly discolored. Please check the photos. Used 2-3 times, but it's a used item stored at home, so please refrain from purchasing if you are sensitive to such things.