AM urges tighter rules on uniforms.
Laura Anne Jones said she was concerned about children being bullied because they could not afford designer labels.
The South Wales East AM, a former pupil at Usk Church in Wales Primary and Caerleon Comprehensive, said stricter dress codes should be enforced.
She said, 'I am extremely worried that school children are being put under increased pressure to wear fashionable clothes and expensive labels. This is costly for parents and can lead to bullying when some children do not wear what are deemed to be the correct labels.
'I am urging all schools to reintroduce stricter dress codes and uniforms as this will help to remove the element of competition between pupils to dress fashionably. I believe that uniforms create a feeling of community and harmony amongst school pupils and are more economic for parents.'
The Assembly Government consulted schools on uniform last term. It is due to send guidelines to schools on appropriate dress codes for pupils.
Plaid Cymru has complained that making young girls wear thigh-length PE skirts is humiliating and could be sexual discrimination.
An Assembly Government spokeswoman said, 'Guidance on gym wear for girls will be included within the document which will be issued to schools and local authorities.'