One 7.5 inch tall Pink I'm One Party Hat. The hat opening has a 6 inch diameter. This fabric covers, thick felt first birthday hat features a trendy rainbow chevron pattern, a felt number 1 with contrasting stitching, a curly grosgrain ribbon bunch, fluffy pompoms, and a comfortable elastic chin strap. Dress your little sweetie in style with this adorable Pink I'm One Party Hat. The decorative stitching and cute little pompoms make this little topper perfect for wearing for 1st birthday portraits, and of course the Big Event. We understand how important your baby's 1st Birthday is to you. Take a look at all of our boutique-style outfits and accessories, and let us help you put together a stylishly classic 1st Birthday party for your little girl.