Size oriented metrics are derived by considering the size of the software product.

Usually, size is measured in terms of lines of code.

These metrics normalize quality and productivity measures using software size.

For example:

Productivity can be measured as output per line of code.

Quality can be measured as defects per line of code.

Since the question says that quality and/or productivity measures are normalized by considering the size of the software, it refers to Size Oriented Metrics.