Just a bit of heel for arch support but still pretty flat. I often dont have first luck with earphone eartips because of my small ears but this fit perfectly without me having to replace it. Tried to to reset many times at no avail. Despite it not fitting well, I find it adorable. rod but think they would easily fit a 1 in. only reason i gave it 4 stars is for some reason with these headphones they randomly turn on my music player when i end a call ( didnt do it with my last headset) and no one at samsung can tell me why ( samsung phone too) The slippers are very cute and soft, BUT they are nowhere near true to size. I sized up to 9 so I could add arch supports, but these are too narrow! Now let me get back to the bass. I didnt like that someone had the affront to offer this as a bike holder suitable for bike maintenance and repair.