I used this to prevent cataracts. I thought a larger brim would be better, so I chose a larger size, but my dog developed a growth on its ear and couldn't wear it anymore, so I'd like to pass it on to someone who can use it ٩(❛ᴗ❛)۶ My dog was 4.5 kg at the time and had a large head m(__)m Images 1 and 2 are of the dog wearing it. It's a hat I was very proud of, and I got a lot of compliments while walking my dog ♪(ᴖ◡ᴖ)♪ It has been washed, but please check the images for signs of use m(__)m When shipping, I will flatten it to pack it, so if you would like it to retain its shape, please let me know in the comments m(__)m 100% cotton dog cap, available in various sizes. - QUALITY: 100% cotton - COLOR: Beige, Pink, Ivory, Mint - STRETCH: Level 1, no stretch - MODEL: Weight 4kg, Size S - MODEL: Weight 7.4kg, Size M - SIZE GUIDE: S size: Head circumference 24cm, M size: Head circumference 51cm, L size: Head circumference 52cm Thank you for looking.