it's far easier to standardize (xsmall, small, medium, large, xlarge) than to allow for custom requirements for the purposes of communication. Most people don'

it's far easier to standardize (xsmall, small, medium, large, xlarge) than to allow for custom requirements for the purposes of communication. Most people don't necessarily know exactly how much they'll need, so its easy to just say "large". Plus, in a virtual setup, optimizing allocations with custom requirements is a far trickier algorithmic problem.