Make certain and Size up

Size up and make certain are semantically related in confirm topic. In some cases you can use "Size up" instead a verb phrase "Make certain", when it comes to topics like make sure.

Size up verb - Look at critically or searchingly, or in minute detail.

Make certain and size up are semantically related in confirm topic. Sometimes you can use "Make certain" instead a verb "Size up", if it concerns topics such as make sure.