a hat comprising a bucket and a brim , which hat may have adjustable bucket diameter or brim configuration or both . the bucket diameter may be adjusted by a circumferential belt secured to the bucket by loops affixed to the latter . length of the belt , as adjusted by modifying the length by which the belt overlaps itself , adjusts the diameter of bucket . the belt may have a fastening element such as hook and loop material to maintain the selected length . the configuration of the brim may be adjusted by for example manually bending or forming a metallic wire incorporated into the brim .