Everyone wants a bobble hat right now and here is my Roll Brim Moss Stitch (Seed Stitch) Bobble Beanie hat knitting pattern. The pattern provides full instructions for 4 sizes XS,S,M & L so can be made for anyone from babies to adults with a head circumference between 16-24 inches. Even the largest size takes less than 100 g of dk yarn including the bobble!