These are 3/4 size medium gauge strings.

Pirastro says:

• Obligato strings have a core made from a modern synthetic multifilament fibre which is wound with chrome steel.

• bright, brilliant and focused sound

• growly tone especially true for the E-string

• very quick response

• suitable for arco and pizzicato

• exceptional well-balanced set

• completely impervious to changes in temperature and humidity