How long is a player's leap?

[Captain Gillette]

I've found documentation on all the dimensions of a player, their ground and air speed, etc. etc. etc. Nowhere can I find the number of units wide a space has to be before it's too far for someone to leap over. I want to make an un-leapable elevator shaft... could someone tell me how wide it needs to be?

Thanks!

[Wanderer]

I'm pretty sure that on level ground that a 256 unit leap will be missed, unless they rocket jump or something.