Standard charts include the normal charts like line, bar, pie etc. Custom charts are user defined. A user can use a chart they have created and make it into a custom chart that they can use again.

Custom machine tools are made to your specifications. Standard tools you are stuck with what they design.

Custom machine tools are the most suitable for meeting all your requirements but it comes with cost. In many cases the standard tools will serve all the purposes.

custom layout

There is no standard size. Walk-in showers are generally custom-made to the specifications of the client.

A real custom made guitar is made to your specification and hand built so in theory should be better