I think first of all it depends upon what kind of massage, was it a hot stone massage or was it a Swedish massage. I think it also depends upon how much attention the therapist gave you and how personable they were. In situations such as these tipping is determined by the receiver and each time it can be different. But everyone has their own scale of tipping for various services rendered. Personally myself I tip according to category whether it be massaged, restaurant, hairdresser, they're all different and all depends upon the person and the service.
If they were really good, I add $10 to $12
$5 or $10
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