The best photos from catalogues junior high girls in g string and teen girl bikini picture
Another mother, Annie Milton, said she thought the letter was "unbelievable", adding: "Schools lay down enough rules without going right down to undergarments.
Last year, the retail chain Argos came under fire for launching a range of underwear for girls as young as nine, which included G-strings and padded bras.
Girls asked not to wear thongs at school
She said she would prefer pupils not to wear thongs to school and asked parents to support her.
Description: She is 11 and she has a good head on her shoulders.