You need maybee a small pea sized bit. You usually just break a bit off and then tare it into smaller peices like if you were preparing bud and then put in your pipe. A good general test of how good your hash is how easy it is to break peices off. With shit hash you need to roast the fuck out of it with a lighter to soften it. With really good hash you just need a bit of body heat i.e. just hold it in your hands. to break peices off.