Diploma Course in Fashion Designing | Institute Design Innovation (IDI) Join IDI’s Diploma Course in Fashion Designing to master sketching, garment making & digital fashion. Build your dream career in the fashion industry. The Diploma Course in Fashion Designing offered by the Institute Design Innovation (IDI) is designed for creative individuals who aspire to make a mark in the fashion industry. This comprehensive program blends creativity, technology, and professional training to prepare students for real-world fashion careers.