5 types of recorders and their approximate measurements are shown on the right : (starting from the smallest)   sopranino - 24cm soprano /descant - 31cm alto / treble - 47cm tenor - 64cm bass - 94cm contra-bass (not shown in the picture)

All recorders of the same range may not necessary sound alike. The timbre may vary slightly. It all depends on the materials, the construction, the player, and even the temperature of the instrument. 

A cold recorder will sound flat and one too warm will sound slightly sharp in pitch. A good instrument should be at correct pitch when the temperature is around 18 degrees Celcius, corresponding to the same temperature at which it was originally tuned.