What is the standard size of a lane for 25m pool?

one of many lanes in a competition pool is about 10 feet wide. though I have been in one lane pools of 8 foot width that work just fine. one reason for the extra width in the multi lane pool is that when in heavy use, there is some overlap of hands/arms and the width is useful to avoid collision. also, during competition, the lanes are wide so that swimmers cannot draft off of one another. hope this helps aloha