Beautiful chair pad. There's no link for a pattern, but you could figure this out from a granny square-type pattern. I think big, chunky yarn and maybe several strands together - should be easy enough to make!
Trin-Annelie's Autumn Trees
cast on 126 sts for ribbing and increased to full stitchcount for a more beanie like look. 6,5cm brim just two colours started increasing some rows later no pom-pom