UNION JACK BOATER HAT NEED A QUICK PACK OF 6? CLICK HERE! UNION JACK BOATER HATS: Make a grand appearance for any British event there may be with our brilliant Union Jack Boater Hats for the most memorable events and occasions! PERFECT SUMMERTIME HAT: This Union Jack Boater Hat is very light and easy to wear, making it a cooling hat to relax under the sun, and even better to wear for celebrating any British Events and Occasions! ONE SIZE FITS MOST: These Union Jack Boater Hat accessories are available in only one size, with the Hat measuring in at 58cm (23"), making it a perfect universal size for most to wear with ease! SIZE GUIDE: ONE SIZE FITS MOST - ADULTS IDEAL FOR JUBILEE PARTIES AND BRITISH FANCY DRESS.