Quality Fashion Knitwear - Knitwear Manufacturers, Leicester, UK Jack Masters Ltd was established in 1987. As the company grew over time, Jack Masters has seen a vast change in the way it runs. Specialising in cut and sewn knitwear Jack Masters supplies a wide range of high street stores and specialist catalogue firms in the UK, Europe and America. Having been in 3 different properties and currently operating at a 35,000 sq ft factory since 1998 Jack Masters has bucked the trend of the UK textile industry and is still producing quality garments Made in England.