There are two types of software sizes:

Technical Size:

- The most technical sizing method is measured in terms of Line of Code per technology.

- The number of lines include in functions, files, classes and tables.

- These are computed with backfiring the Function Points.

Functional Size:

- The very common function size is Function Point Analysis.

- FPA is all about measuring the software deliverables.

- FPA is based on the requirements of the user and presents accurate representation of developer and estimator.

- FPA reflects the functionality that is delivered to the client.

- FPA involves in identifying and weighting of inputs, outputs and data storage.