How should a commander deck be split?

[Greg54js]

So right now my bolas commander deck is in the works and I have 60 creature/spells and then I'm going to run 40 lands... Is this acceptable or should I run less land and more creature/spells?

[BoyMac]

40 is a good number of lands. I usually do 39 + {Sol Ring} as a base.

[Greg54js]

Thanks you've just made my bolas edh that much closer to it's finish

[Spikepit]

Do forget about the various Signots ({Orzhov Signot}, {Golgari Signot}, {Boros Signot}, etc) that should be staple in every commander deck, as well as the Alara applicable Obilisk ({Obilisk of Esper}) for tri colour decks. {Darksteel Ignot} and the dual lands from Lorwyn/Shadowmoor ({Fetid Heath}) are also recommended.

I offen run 38 lands with the above mana givers, plus others, quite seemlessly.

[rustyknives]

Command tower should not be forgotten. My lands are around 32 lands with command tower, rupture spire, fetch lands, temple of false gods, then I have sol ring and darksteel ingot