Pathfinder 1e Magic Item Creation: Save Bonus Limit

I was just wondering, for items in Pathfinder 1e that provide saves bonuses (like a Cloak of Resistance), they seem to only go up to +5, but in the Magic Item Creation rules, it looks like you could go much higher, all you’d need to do would be to calculate the different cost (and have that much gold to begin with, of course). Is a save bonus higher than +5 on any one item legal, or is there a hard limit to that?