Short answer
Use Panchkuva Cloth Market and New Cloth Market in Ahmedabad for cotton and poly-cotton uniform checks, Champa Galli and Mulji Jetha Market in Mumbai for suiting and shirting rolls, and New Textile Market in Surat for synthetic uniform yardage.
Institutional uniform contractors and school uniform manufacturers source across all three hubs:
Tell us what you're looking for and we'll point you to the right market or supplier.