Features: With its breathable cloth and adjustable strap, this sun hat is great to show your cute pet. Great to add some humor to their dogs look. Suitable for dog of different head circumferences. Breathable canvas material, lightweight and comfortable for your little pet to wear. Perfect for birthday/summer wear,make dog beautiful. Specifications: Material: Canvas Color: 18 Option Size:S Head Circumferences:31cm(12.20inch) Diameter:(3.35inch) Size:M Head Circumferences:34cm(13.39inch) Diameter:11cm(4.33inch) Size:L Head Circumferences:44cm(17.32inch) Diameter:(5.31inch) Size:XL Head Circumferences:54cm(21.26inch) Diameter:16cm(6.30inch) Package Includes: 1x Pet Hat note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.