Saraband Music sells two types of bags for music.
1. A4 size bag, made from the same "fabric" as green supermarket bags. Each bag is in two colours, with a quaver motif on one side; short carry handles. They're a snug fit for A4 music or you could carry small accessories and CDs in them. $3.40 ($3.75)
2. For string players, a small drawstring bag in which to carry or store your strings. Sheer fabric decorated with music notation and stars scattered over them. They're quite pretty and would make a nice little gift. $2.50 ($2.75)
Prices in brackets include GST (Australia only).