It all depends on a lot of factors, what position you are in the blinds, how deep in the game, your starting hand, your chip stack. the list go's on, but more importantly how you are seen by others at the table.
Do they think you are tight player or loose player the list go's on and on again.
You should be aiming to raise any pot when there are too many limper's and the general rule is one blind for every limper so if you have the small blind a and big blind plus 4 limper's a 6X bet is normal, but be ready to call an all-in because you get players limping with a massive hand just waiting for someone in late position to raise so they can shove.
I know because I do it often with hands like AA and KK limp early position and hope someone in late position raise's and raise's big enough for me to shove.
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