The My Friend Dolls were
produced by Fisher Price from the mid to late 70's through the
early 80's. The dolls were around 15 inches tall and came
with their own little outfits (including shoes and a hat).
There were plenty of clothing accessory sets you could buy
(ballerina, cheerleader, etc.).
Of course Mandy had friends, there was My Friend Mikey, My
Friend Jenny, My Friend Nicki (an African American), and My Friend Becky.