NONE! These are Gibbons, which are apes NOT monkeys.
The Gibbon sanctuary is about 40 KMs from Mae Sot and houses Gibbons which have been rescued from captivity and can not be returned to the wild (many of them have amputated limbs).
This is Simone, a 2 year old hyper-active Gibbon that was abandoned by her mother.
Simone playing with the dog.
Here are the rest of the pics