Blue Fuzzy Slippers Compatible with American Girl Dolls and Bitty Twins Blue Fuzzy Slippers Compatible with American Girl Dolls. Available in Several Colors Match to Your Favorite Doll Nightgown or Pjs Also fits the 15 Inch Bitty Twins Made By My Brittany's, North Americas Largest Doll Clothing Manufacturer, Not affiliated with American Girl, Reg. Trademark of American Girl, LLC.