A Gamelan orchestra can be as small as 2 people. The Gamelan orchestra can be as large as 20 or 30 people big.
Chamber orchestra
A chamber orchestra. Sinfonietta
Another term is "chamber" orchestra.
It is a work for orchestra and a soloist.
A chamber orchestra. Sinfonietta
Band or Wind Ensemble
The KPM Philharmonic Orchestra is an orchestra that specializes in such classics as Bach and Strauss, but also sacred music. They have a large selection on iTunes.
It all depends on how large the orchestra is. There isn't really a definite answer to this question
Hershey's Symphony!
The piccolo, which is a small version of the flute.
Usually large, but can range from 10 to 100