Dolly shoes are flat slip on courts with an ankle strap fastened by a button or buckle. they have a differennt history to ballerina flats.
Child's dolly shoes by Marshall & Snelgrove 1930s
The origin of this style is thought to stem from the French Doll manufacturer Jumeau who began business in the 1840s.
Bebe Jumeau doll's shoes, Victorian
Nowadays of course you can be any age to wear them
Silver glitter dolly shoes with a heel by Prada