Shoe Doodles, Hey Mom's & Dad's, These should not hurt your children's feet like other charms for rubber shoes &/or Croc's.  We have evaluated many different brands until we found these & The other brand we will be handling.  Try these with peace of mind!!.  The piece that fits inside the shoe is longer than the others and FLATTER, this provides more comfortable positions, so your feet do not feel that there are rubber balls across the top of your feet, inside your shoes.  Shoe-Doodles are a fun form of self expression that allows you to decorate your Rubber Clogs with our hundreds of unique charm designs. Shoe-Doodles fit all makes of rubber clogs and are available in many shapes, styles and colors.